From 455a7f3275d264f6e66045b92c83747ec461dda5 Mon Sep 17 00:00:00 2001
From: Junio C Hamano <junio@twinsun.com>
Date: Fri, 30 Sep 2005 13:31:16 -0700
Subject: [PATCH] More portability.

 - The location of openssl development files got customizable.
 - The location of iconv development files got customizable.
 - Pass $TAR down to t5000 test so that the user can override with
   'gmake TAR=gtar'.
 - Solaris 'bc' does not seem to grok "define abs()".  There is no
   reason to use bc there -- expr would do.

Signed-off-by: Junio C Hamano <junio@twinsun.com>
---
 Makefile                   | 20 +++++++++++++++++---
 t/Makefile                 |  1 +
 t/t5000-tar-tree.sh        |  6 +++---
 t/t6002-rev-list-bisect.sh | 29 +++++++++++++----------------
 4 files changed, 34 insertions(+), 22 deletions(-)

diff --git a/Makefile b/Makefile
index 5648296a8d..e7f3d1ffca 100644
--- a/Makefile
+++ b/Makefile
@@ -200,18 +200,32 @@ endif
 ifndef NO_OPENSSL
 	LIB_OBJS += epoch.o
 	OPENSSL_LIBSSL = -lssl
+	ifdef OPENSSLDIR
+		# Again this may be problematic -- gcc does not always want -R.
+		CFLAGS += -I$(OPENSSLDIR)/include
+		OPENSSL_LINK = -L$(OPENSSLDIR)/lib -R$(OPENSSLDIR)/lib
+	else
+		OPENSSL_LINK =
+	endif
 else
 	DEFINES += '-DNO_OPENSSL'
 	MOZILLA_SHA1 = 1
 	OPENSSL_LIBSSL =
 endif
 ifdef NEEDS_SSL_WITH_CRYPTO
-	LIB_4_CRYPTO = -lcrypto -lssl
+	LIB_4_CRYPTO = $(OPENSSL_LINK) -lcrypto -lssl
 else
-	LIB_4_CRYPTO = -lcrypto
+	LIB_4_CRYPTO = $(OPENSSL_LINK) -lcrypto
 endif
 ifdef NEEDS_LIBICONV
-	LIB_4_ICONV = -liconv
+	ifdef ICONVDIR
+		# Again this may be problematic -- gcc does not always want -R.
+		CFLAGS += -I$(ICONVDIR)/include
+		ICONV_LINK = -L$(ICONVDIR)/lib -R$(ICONVDIR)/lib
+	else
+		ICONV_LINK =
+	endif
+	LIB_4_ICONV = $(ICONV_LINK) -liconv
 else
 	LIB_4_ICONV =
 endif
diff --git a/t/Makefile b/t/Makefile
index a6b80882ce..e71da7782e 100644
--- a/t/Makefile
+++ b/t/Makefile
@@ -5,6 +5,7 @@
 
 #GIT_TEST_OPTS=--verbose --debug
 SHELL_PATH ?= $(SHELL)
+TAR ?= $(TAR)
 
 T = $(wildcard t[0-9][0-9][0-9][0-9]-*.sh)
 
diff --git a/t/t5000-tar-tree.sh b/t/t5000-tar-tree.sh
index 6bf34066e1..5dffb8e1e5 100755
--- a/t/t5000-tar-tree.sh
+++ b/t/t5000-tar-tree.sh
@@ -50,7 +50,7 @@ test_expect_success \
 
 test_expect_success \
     'validate file modification time' \
-    'TZ=GMT tar tvf b.tar a/a |
+    'TZ=GMT $TAR tvf b.tar a/a |
      awk \{print\ \$4,\ \(length\(\$5\)\<7\)\ ?\ \$5\":00\"\ :\ \$5\} \
      >b.mtime &&
      echo "2005-05-27 22:00:00" >expected.mtime &&
@@ -63,7 +63,7 @@ test_expect_success \
 
 test_expect_success \
     'extract tar archive' \
-    '(cd b && tar xf -) <b.tar'
+    '(cd b && $TAR xf -) <b.tar'
 
 test_expect_success \
     'validate filenames' \
@@ -80,7 +80,7 @@ test_expect_success \
 
 test_expect_success \
     'extract tar archive with prefix' \
-    '(cd c && tar xf -) <c.tar'
+    '(cd c && $TAR xf -) <c.tar'
 
 test_expect_success \
     'validate filenames with prefix' \
diff --git a/t/t6002-rev-list-bisect.sh b/t/t6002-rev-list-bisect.sh
index d0a4ff29c9..42fcbc60ca 100755
--- a/t/t6002-rev-list-bisect.sh
+++ b/t/t6002-rev-list-bisect.sh
@@ -7,20 +7,6 @@ test_description='Tests git-rev-list --bisect functionality'
 . ./test-lib.sh
 . ../t6000lib.sh # t6xxx specific functions
 
-bc_expr()
-{
-bc <<EOF
-scale=1
-define abs(x) {
-	if (x>=0) { return (x); } else { return (-x); }
-}
-define floor(x) {
-	save=scale; scale=0; result=x/1; scale=save; return (result);
-}
-$*
-EOF
-}
-
 # usage: test_bisection max-diff bisect-option head ^prune...
 #
 # e.g. test_bisection 1 --bisect l1 ^l0
@@ -35,8 +21,19 @@ test_bisection_diff()
         _head=$1
 	shift 1
 	_bisection_size=$(git-rev-list $_bisection "$@" | wc -l)
-	[ -n "$_list_size" -a -n "$_bisection_size" ] || error "test_bisection_diff failed"
-	test_expect_success "bisection diff $_bisect_option $_head $* <= $_max_diff" "[ $(bc_expr "floor(abs($_list_size/2)-$_bisection_size)") -le $_max_diff ]"
+	[ -n "$_list_size" -a -n "$_bisection_size" ] ||
+	error "test_bisection_diff failed"
+
+	# Test if bisection size is close to half of list size within
+	# tolerance.
+	# 
+	_bisect_err=`expr $_list_size - $_bisection_size \* 2`
+	test "$_bisect_err" -lt 0 && _bisect_err=`expr 0 - $_bisect_err`
+	_bisect_err=`expr $_bisect_err / 2` ; # floor
+
+	test_expect_success \
+	"bisection diff $_bisect_option $_head $* <= $_max_diff" \
+	'test $_bisect_err -le $_max_diff'
 }
 
 date >path0