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425 lines
14 KiB
425 lines
14 KiB
commit 4a6aca7bf8a70f1dc66a07c04aba2d7fd837602d |
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Author: Siddhesh Poyarekar <siddhesh@redhat.com> |
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Date: Mon Dec 29 17:37:54 2014 +0530 |
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Remove Wundef warnings for specification macros |
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This patch adds a file posix-conf-vars.list that is used to generate |
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macros to determine if a macro is defined as set, unset or not |
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defined. gen-posix-conf-vars.awk processes this file and generates a |
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header (posix-conf-vars-def.h) with these macros. A new header |
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posix-conf-vars.h includes this generated header and defines accessor |
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macros for the generated macros. |
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Tested on x86_64. |
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* posix/Makefile (before-compile): Add posix-conf-vars-def.h. |
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($(objpfx)posix-conf-vars-def.h): New target. |
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* posix/posix-conf-vars.list: New file. |
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* posix/posix-conf-vars.h: New file. |
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* posix/confstr.c: Include posix-conf-vars.h. |
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(confstr): Use CONF_IS_* macros. |
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* posix/posix-envs.def: Include posix-conf-vars.h. Use |
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CONF_IS_* macros. |
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* scripts/gen-posix-conf-vars.awk: New file. |
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diff --git a/posix/Makefile b/posix/Makefile |
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index 4034282866139aaa..c272e87a480f5254 100644 |
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--- a/posix/Makefile |
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+++ b/posix/Makefile |
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@@ -96,7 +96,7 @@ others := getconf |
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install-bin := getconf |
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install-others-programs := $(inst_libexecdir)/getconf |
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|
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-before-compile += testcases.h ptestcases.h |
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+before-compile += testcases.h ptestcases.h posix-conf-vars-def.h |
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# So they get cleaned up. |
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generated := $(addprefix wordexp-test-result, 1 2 3 4 5 6 7 8 9 10) \ |
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@@ -288,3 +288,9 @@ $(objpfx)getconf.speclist: getconf-speclist.c posix-envs.def |
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# be built both makes it available for eyeball inspection and avoids the |
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# surprise of things that look like compilation being done by 'make install'. |
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others: $(objpfx)getconf.speclist |
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+ |
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+$(objpfx)posix-conf-vars-def.h: $(..)scripts/gen-posix-conf-vars.awk \ |
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+ posix-conf-vars.list Makefile |
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+ $(make-target-directory) |
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+ $(AWK) -f $(filter-out Makefile, $^) > $@.tmp |
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+ mv -f $@.tmp $@ |
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diff --git a/posix/confstr.c b/posix/confstr.c |
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index 7d86d60bc177c32d..5b03986a3678e007 100644 |
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--- a/posix/confstr.c |
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+++ b/posix/confstr.c |
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@@ -21,6 +21,7 @@ |
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#include <string.h> |
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#include <confstr.h> |
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#include "../version.h" |
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+#include <posix-conf-vars.h> |
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|
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/* If BUF is not NULL and LEN > 0, fill in at most LEN - 1 bytes |
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of BUF with the value corresponding to NAME and zero-terminate BUF. |
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@@ -100,9 +101,9 @@ confstr (name, buf, len) |
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case _CS_POSIX_V6_ILP32_OFF32_CFLAGS: |
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case _CS_POSIX_V7_ILP32_OFF32_CFLAGS: |
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#ifdef __ILP32_OFF32_CFLAGS |
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-# if _POSIX_V7_ILP32_OFF32 == -1 |
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+# if CONF_IS_DEFINED_UNSET (_POSIX_V7_ILP32_OFF32) |
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# error "__ILP32_OFF32_CFLAGS should not be defined" |
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-# elif !defined _POSIX_V7_ILP32_OFF32 |
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+# elif CONF_IS_UNDEFINED (_POSIX_V7_ILP32_OFF32) |
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if (__sysconf (_SC_V7_ILP32_OFF32) < 0) |
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break; |
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# endif |
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@@ -115,9 +116,9 @@ confstr (name, buf, len) |
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case _CS_POSIX_V6_ILP32_OFFBIG_CFLAGS: |
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case _CS_POSIX_V7_ILP32_OFFBIG_CFLAGS: |
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#ifdef __ILP32_OFFBIG_CFLAGS |
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-# if _POSIX_V7_ILP32_OFFBIG == -1 |
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+# if CONF_IS_DEFINED_UNSET (_POSIX_V7_ILP32_OFFBIG) |
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# error "__ILP32_OFFBIG_CFLAGS should not be defined" |
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-# elif !defined _POSIX_V7_ILP32_OFFBIG |
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+# elif CONF_IS_UNDEFINED (_POSIX_V7_ILP32_OFFBIG) |
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if (__sysconf (_SC_V7_ILP32_OFFBIG) < 0) |
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break; |
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# endif |
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@@ -130,9 +131,9 @@ confstr (name, buf, len) |
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case _CS_POSIX_V6_LP64_OFF64_CFLAGS: |
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case _CS_POSIX_V7_LP64_OFF64_CFLAGS: |
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#ifdef __LP64_OFF64_CFLAGS |
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-# if _POSIX_V7_LP64_OFF64 == -1 |
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+# if CONF_IS_DEFINED_UNSET (_POSIX_V7_LP64_OFF64) |
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# error "__LP64_OFF64_CFLAGS should not be defined" |
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-# elif !defined _POSIX_V7_LP64_OFF64 |
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+# elif CONF_IS_UNDEFINED (_POSIX_V7_LP64_OFF64) |
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if (__sysconf (_SC_V7_LP64_OFF64) < 0) |
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break; |
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# endif |
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@@ -145,9 +146,9 @@ confstr (name, buf, len) |
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case _CS_POSIX_V6_ILP32_OFF32_LDFLAGS: |
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case _CS_POSIX_V7_ILP32_OFF32_LDFLAGS: |
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#ifdef __ILP32_OFF32_LDFLAGS |
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-# if _POSIX_V7_ILP32_OFF32 == -1 |
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+# if CONF_IS_DEFINED_UNSET (_POSIX_V7_ILP32_OFF32 ) |
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# error "__ILP32_OFF32_LDFLAGS should not be defined" |
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-# elif !defined _POSIX_V7_ILP32_OFF32 |
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+# elif CONF_IS_UNDEFINED (_POSIX_V7_ILP32_OFF32) |
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if (__sysconf (_SC_V7_ILP32_OFF32) < 0) |
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break; |
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# endif |
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@@ -160,9 +161,9 @@ confstr (name, buf, len) |
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case _CS_POSIX_V6_ILP32_OFFBIG_LDFLAGS: |
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case _CS_POSIX_V7_ILP32_OFFBIG_LDFLAGS: |
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#ifdef __ILP32_OFFBIG_LDFLAGS |
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-# if _POSIX_V7_ILP32_OFFBIG == -1 |
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+# if CONF_IS_DEFINED_UNSET (_POSIX_V7_ILP32_OFFBIG) |
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# error "__ILP32_OFFBIG_LDFLAGS should not be defined" |
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-# elif !defined _POSIX_V7_ILP32_OFFBIG |
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+# elif CONF_IS_UNDEFINED (_POSIX_V7_ILP32_OFFBIG) |
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if (__sysconf (_SC_V7_ILP32_OFFBIG) < 0) |
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break; |
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# endif |
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@@ -175,9 +176,9 @@ confstr (name, buf, len) |
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case _CS_POSIX_V6_LP64_OFF64_LDFLAGS: |
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case _CS_POSIX_V7_LP64_OFF64_LDFLAGS: |
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#ifdef __LP64_OFF64_LDFLAGS |
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-# if _POSIX_V7_LP64_OFF64 == -1 |
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+# if CONF_IS_DEFINED_UNSET (_POSIX_V7_LP64_OFF64) |
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# error "__LP64_OFF64_LDFLAGS should not be defined" |
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-# elif !defined _POSIX_V7_LP64_OFF64 |
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+# elif CONF_IS_UNDEFINED (_POSIX_V7_LP64_OFF64) |
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if (__sysconf (_SC_V7_LP64_OFF64) < 0) |
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break; |
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# endif |
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@@ -188,7 +189,8 @@ confstr (name, buf, len) |
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case _CS_LFS_CFLAGS: |
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case _CS_LFS_LINTFLAGS: |
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-#if _POSIX_V6_ILP32_OFF32 == 1 && _POSIX_V6_ILP32_OFFBIG == 1 |
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+#if (CONF_IS_DEFINED_SET (_POSIX_V6_ILP32_OFF32) \ |
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+ && CONF_IS_DEFINED_SET (_POSIX_V6_ILP32_OFFBIG)) |
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# define __LFS_CFLAGS "-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64" |
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/* Signal that we want the new ABI. */ |
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string = __LFS_CFLAGS; |
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diff --git a/posix/posix-conf-vars.h b/posix/posix-conf-vars.h |
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new file mode 100644 |
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index 0000000000000000..6faf29f56b55b7e8 |
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--- /dev/null |
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+++ b/posix/posix-conf-vars.h |
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@@ -0,0 +1,48 @@ |
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+/* Macros to check if a POSIX configuration variable is defined or set. |
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+ |
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+ Copyright (C) 1991-2014 Free Software Foundation, Inc. |
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+ This file is part of the GNU C Library. |
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+ |
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+ The GNU C Library is free software; you can redistribute it and/or |
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+ modify it under the terms of the GNU Lesser General Public |
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+ License as published by the Free Software Foundation; either |
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+ version 2.1 of the License, or (at your option) any later version. |
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+ |
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+ The GNU C Library is distributed in the hope that it will be useful, |
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of |
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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+ Lesser General Public License for more details. |
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+ |
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+ You should have received a copy of the GNU Lesser General Public |
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+ License along with the GNU C Library; if not, see |
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+ <http://www.gnu.org/licenses/>. */ |
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+ |
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+#ifndef _POSIX_CONF_VARS_H |
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+#define _POSIX_CONF_VARS_H |
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+ |
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+/* The script gen-posix-conf-vars.awk generates the header |
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+ posix-conf-vars-def.h from the list file posix-conf-vars.list and defines |
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+ CONF_DEF_* macros for each entry in the list file set to either of |
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+ CONF_DEF_UNDEFINED, CONF_DEF_DEFINED_SET or CONF_DEF_DEFINED_UNSET. To |
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+ check configuration variables within glibc code, use the configuration macro |
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+ functions instead of checking for definitions of the macros. */ |
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+ |
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+#include <posix-conf-vars-def.h> |
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+ |
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+#define CONF_DEF_UNDEFINED 1 |
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+#define CONF_DEF_DEFINED_SET 2 |
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+#define CONF_DEF_DEFINED_UNSET 3 |
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+ |
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+/* The configuration variable is not defined. */ |
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+#define CONF_IS_UNDEFINED(conf) (CONF_DEF##conf == CONF_DEF_UNDEFINED) |
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+ |
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+/* The configuration variable is defined. It may or may not be set. */ |
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+#define CONF_IS_DEFINED(conf) (CONF_DEF##conf != CONF_DEF_UNDEFINED) |
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+ |
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+/* The configuration variable is defined and set. */ |
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+#define CONF_IS_DEFINED_SET(conf) (CONF_DEF##conf == CONF_DEF_DEFINED_SET) |
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+ |
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+/* The configuration variable is defined but not set. */ |
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+#define CONF_IS_DEFINED_UNSET(conf) (CONF_DEF##conf == CONF_DEF_DEFINED_UNSET) |
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+ |
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+#endif |
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diff --git a/posix/posix-conf-vars.list b/posix/posix-conf-vars.list |
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new file mode 100644 |
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index 0000000000000000..8f308c216626c59c |
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--- /dev/null |
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+++ b/posix/posix-conf-vars.list |
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@@ -0,0 +1,22 @@ |
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+# Configuration variables identified by getconf. The heading of each section |
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+# is of the format TYPE PREFIX with the opening curly brace on the same line. |
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+# TYPE can either be SYSCONF, PATHCONF, CONFSTR or SPEC. Variable names are |
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+# put one on each line with a curly brace on its own line ending the section. |
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+ |
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+SPEC POSIX { |
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+ V6_ILP32_OFF32 |
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+ V6_ILP32_OFFBIG |
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+ V6_LP64_OFF64 |
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+ V6_LPBIG_OFFBIG |
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+ V7_ILP32_OFF32 |
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+ V7_ILP32_OFFBIG |
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+ V7_LP64_OFF64 |
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+ V7_LPBIG_OFFBIG |
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+} |
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+ |
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+SPEC XBS5 { |
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+ ILP32_OFF32 |
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+ ILP32_OFFBIG |
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+ LP64_OFF64 |
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+ LPBIG_OFFBIG |
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+} |
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diff --git a/posix/posix-envs.def b/posix/posix-envs.def |
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index c32ea8acfcfebb78..e820e6dbe3fa3b61 100644 |
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--- a/posix/posix-envs.def |
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+++ b/posix/posix-envs.def |
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@@ -42,35 +42,37 @@ |
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defined. These are called with arguments V5, V6, V7 before and |
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after the relevant groups of environments. */ |
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+#include <posix-conf-vars.h> |
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+ |
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START_ENV_GROUP (V7) |
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|
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-#if _POSIX_V7_ILP32_OFF32 > 0 |
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+#if CONF_IS_DEFINED_SET (_POSIX_V7_ILP32_OFF32) |
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KNOWN_PRESENT_ENVIRONMENT (V7, POSIX_V7, ILP32_OFF32) |
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-#elif defined _POSIX_V7_ILP32_OFF32 |
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+#elif CONF_IS_DEFINED (_POSIX_V7_ILP32_OFF32) |
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KNOWN_ABSENT_ENVIRONMENT (V7, POSIX_V7, ILP32_OFF32) |
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#else |
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UNKNOWN_ENVIRONMENT (V7, POSIX_V7, ILP32_OFF32) |
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#endif |
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-#if _POSIX_V7_ILP32_OFFBIG > 0 |
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+#if CONF_IS_DEFINED_SET (_POSIX_V7_ILP32_OFFBIG) |
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KNOWN_PRESENT_ENVIRONMENT (V7, POSIX_V7, ILP32_OFFBIG) |
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-#elif defined _POSIX_V7_ILP32_OFFBIG |
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+#elif CONF_IS_DEFINED (_POSIX_V7_ILP32_OFFBIG) |
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KNOWN_ABSENT_ENVIRONMENT (V7, POSIX_V7, ILP32_OFFBIG) |
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#else |
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UNKNOWN_ENVIRONMENT (V7, POSIX_V7, ILP32_OFFBIG) |
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#endif |
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-#if _POSIX_V7_LP64_OFF64 > 0 |
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+#if CONF_IS_DEFINED_SET (_POSIX_V7_LP64_OFF64) |
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KNOWN_PRESENT_ENVIRONMENT (V7, POSIX_V7, LP64_OFF64) |
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-#elif defined _POSIX_V7_LP64_OFF64 |
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+#elif CONF_IS_DEFINED (_POSIX_V7_LP64_OFF64) |
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KNOWN_ABSENT_ENVIRONMENT (V7, POSIX_V7, LP64_OFF64) |
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#else |
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UNKNOWN_ENVIRONMENT (V7, POSIX_V7, LP64_OFF64) |
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#endif |
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-#if _POSIX_V7_LPBIG_OFFBIG > 0 |
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+#if CONF_IS_DEFINED_SET (_POSIX_V7_LPBIG_OFFBIG) |
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KNOWN_PRESENT_ENVIRONMENT (V7, POSIX_V7, LPBIG_OFFBIG) |
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-#elif defined _POSIX_V7_LPBIG_OFFBIG |
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+#elif CONF_IS_DEFINED (_POSIX_V7_LPBIG_OFFBIG) |
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KNOWN_ABSENT_ENVIRONMENT (V7, POSIX_V7, LPBIG_OFFBIG) |
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#else |
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UNKNOWN_ENVIRONMENT (V7, POSIX_V7, LPBIG_OFFBIG) |
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@@ -80,33 +82,33 @@ END_ENV_GROUP (V7) |
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START_ENV_GROUP (V6) |
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-#if _POSIX_V6_ILP32_OFF32 > 0 |
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+#if CONF_IS_DEFINED_SET (_POSIX_V6_ILP32_OFF32) |
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KNOWN_PRESENT_ENVIRONMENT (V6, POSIX_V6, ILP32_OFF32) |
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-#elif defined _POSIX_V6_ILP32_OFF32 |
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+#elif CONF_IS_DEFINED (_POSIX_V6_ILP32_OFF32) |
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KNOWN_ABSENT_ENVIRONMENT (V6, POSIX_V6, ILP32_OFF32) |
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#else |
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UNKNOWN_ENVIRONMENT (V6, POSIX_V6, ILP32_OFF32) |
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#endif |
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-#if _POSIX_V6_ILP32_OFFBIG > 0 |
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+#if CONF_IS_DEFINED_SET (_POSIX_V6_ILP32_OFFBIG) |
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KNOWN_PRESENT_ENVIRONMENT (V6, POSIX_V6, ILP32_OFFBIG) |
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-#elif defined _POSIX_V6_ILP32_OFFBIG |
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+#elif CONF_IS_DEFINED (_POSIX_V6_ILP32_OFFBIG) |
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KNOWN_ABSENT_ENVIRONMENT (V6, POSIX_V6, ILP32_OFFBIG) |
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#else |
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UNKNOWN_ENVIRONMENT (V6, POSIX_V6, ILP32_OFFBIG) |
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#endif |
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|
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-#if _POSIX_V6_LP64_OFF64 > 0 |
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+#if CONF_IS_DEFINED_SET (_POSIX_V6_LP64_OFF64) |
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KNOWN_PRESENT_ENVIRONMENT (V6, POSIX_V6, LP64_OFF64) |
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-#elif defined _POSIX_V6_LP64_OFF64 |
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+#elif CONF_IS_DEFINED (_POSIX_V6_LP64_OFF64) |
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KNOWN_ABSENT_ENVIRONMENT (V6, POSIX_V6, LP64_OFF64) |
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#else |
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UNKNOWN_ENVIRONMENT (V6, POSIX_V6, LP64_OFF64) |
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#endif |
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|
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-#if _POSIX_V6_LPBIG_OFFBIG > 0 |
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+#if CONF_IS_DEFINED_SET (_POSIX_V6_LPBIG_OFFBIG) |
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KNOWN_PRESENT_ENVIRONMENT (V6, POSIX_V6, LPBIG_OFFBIG) |
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-#elif defined _POSIX_V6_LPBIG_OFFBIG |
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+#elif CONF_IS_DEFINED (_POSIX_V6_LPBIG_OFFBIG) |
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KNOWN_ABSENT_ENVIRONMENT (V6, POSIX_V6, LPBIG_OFFBIG) |
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#else |
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UNKNOWN_ENVIRONMENT (V6, POSIX_V6, LPBIG_OFFBIG) |
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@@ -116,33 +118,33 @@ END_ENV_GROUP (V6) |
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|
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START_ENV_GROUP (V5) |
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|
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-#if _XBS5_ILP32_OFF32 > 0 |
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+#if CONF_IS_DEFINED_SET (_XBS5_ILP32_OFF32) |
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KNOWN_PRESENT_ENVIRONMENT (XBS5, XBS5, ILP32_OFF32) |
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-#elif defined _XBS5_ILP32_OFF32 |
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+#elif CONF_IS_DEFINED (_XBS5_ILP32_OFF32) |
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KNOWN_ABSENT_ENVIRONMENT (XBS5, XBS5, ILP32_OFF32) |
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#else |
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UNKNOWN_ENVIRONMENT (XBS5, XBS5, ILP32_OFF32) |
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#endif |
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|
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-#if _XBS5_ILP32_OFFBIG > 0 |
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+#if CONF_IS_DEFINED_SET (_XBS5_ILP32_OFFBIG) |
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KNOWN_PRESENT_ENVIRONMENT (XBS5, XBS5, ILP32_OFFBIG) |
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-#elif defined _XBS5_ILP32_OFFBIG |
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+#elif CONF_IS_DEFINED (_XBS5_ILP32_OFFBIG) |
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KNOWN_ABSENT_ENVIRONMENT (XBS5, XBS5, ILP32_OFFBIG) |
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#else |
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UNKNOWN_ENVIRONMENT (XBS5, XBS5, ILP32_OFFBIG) |
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#endif |
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|
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-#if _XBS5_LP64_OFF64 > 0 |
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+#if CONF_IS_DEFINED_SET (_XBS5_LP64_OFF64) |
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KNOWN_PRESENT_ENVIRONMENT (XBS5, XBS5, LP64_OFF64) |
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-#elif defined _XBS5_LP64_OFF64 |
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+#elif CONF_IS_DEFINED (_XBS5_LP64_OFF64) |
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KNOWN_ABSENT_ENVIRONMENT (XBS5, XBS5, LP64_OFF64) |
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#else |
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UNKNOWN_ENVIRONMENT (XBS5, XBS5, LP64_OFF64) |
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#endif |
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|
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-#if _XBS5_LPBIG_OFFBIG > 0 |
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+#if CONF_IS_DEFINED_SET (_XBS5_LPBIG_OFFBIG) |
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KNOWN_PRESENT_ENVIRONMENT (XBS5, XBS5, LPBIG_OFFBIG) |
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-#elif defined _XBS5_LPBIG_OFFBIG |
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+#elif CONF_IS_DEFINED (_XBS5_LPBIG_OFFBIG) |
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KNOWN_ABSENT_ENVIRONMENT (XBS5, XBS5, LPBIG_OFFBIG) |
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#else |
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UNKNOWN_ENVIRONMENT (XBS5, XBS5, LPBIG_OFFBIG) |
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diff --git a/scripts/gen-posix-conf-vars.awk b/scripts/gen-posix-conf-vars.awk |
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new file mode 100644 |
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index 0000000000000000..16e20fc1007bd2f5 |
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--- /dev/null |
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+++ b/scripts/gen-posix-conf-vars.awk |
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@@ -0,0 +1,61 @@ |
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+# Generate posix-conf-vars-def.h with definitions for CONF_DEF{CONF} for each |
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+# configuration variable that getconf or sysconf may use. Currently it is |
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+# equipped only to generate such macros for specification macros and for |
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+# SYSCONF macros in the _POSIX namespace. |
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+ |
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+BEGIN { |
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+ prefix = "" |
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+} |
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+ |
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+$1 ~ /^#/ || $0 ~ /^\s*$/ { |
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+ next |
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+} |
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+ |
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+# Begin a new prefix. |
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+$NF == "{" { |
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+ type = $1 |
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+ prefix = $2 |
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+ next |
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+} |
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+ |
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+$1 == "}" { |
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+ prefix = "" |
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+ type = "" |
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+ next |
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+} |
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+ |
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+{ |
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+ if (prefix == "" && type == "" && sc_prefix == "") { |
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+ printf ("Syntax error at %s:%d\n", FILENAME, FNR) > "/dev/stderr" |
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+ exit 1 |
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+ } |
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+ |
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+ # The prefix and variable names are indices and the value indicates what type |
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+ # of variable it is. The possible options are: |
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+ # CONFSTR: A configuration string |
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+ # SYSCONF: A numeric value |
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+ # SPEC: A specification |
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+ conf[prefix][$1] = type |
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+} |
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+ |
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+END { |
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+ print "/* AUTOGENERATED by gen-posix-conf-vars.awk. DO NOT EDIT. */\n" |
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+ |
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+ # Generate macros that specify if a sysconf macro is defined and/or set. |
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+ for (p in conf) { |
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+ for (c in conf[p]) { |
|
+ printf "#ifndef _%s_%s\n", p, c |
|
+ printf "# define CONF_DEF_%s_%s CONF_DEF_UNDEFINED\n", p, c |
|
+ # CONFSTR have string values and they are not set or unset. |
|
+ if (conf[p][c] != "CONFSTR") { |
|
+ printf "#else\n" |
|
+ printf "# if _%s_%s > 0\n", p, c |
|
+ printf "# define CONF_DEF_%s_%s CONF_DEF_DEFINED_SET\n", p, c |
|
+ printf "# else\n" |
|
+ printf "# define CONF_DEF_%s_%s CONF_DEF_DEFINED_UNSET\n", p, c |
|
+ printf "# endif\n" |
|
+ } |
|
+ printf "#endif\n\n" |
|
+ } |
|
+ } |
|
+}
|
|
|