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#
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# Red Hat BZ:
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# https://bugzilla.redhat.com/show_bug.cgi?id=911307
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#
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# Sourceware BZ: None.
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#
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# Upstreamm submission: Not yet completed.
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#
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# ChangeLog
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#
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# 2013-02-27 Carlos O'Donell <carlos@redhat.com>
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#
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# * elf/Makefile (CFLAGS-.o): Add -fno-tree-loop-distribute-patterns.
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# (CFLAGS-.os): Likewise.
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# (CFLAGS-.op): Likewise.
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# (CFLAGS-.ob): Likewise.
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# (CFLAGS-.oS): Likewise.
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# * string/Makefile (CFLAGS-.o): Likewise.
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# (CFLAGS-.os): Likewise.
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# (CFLAGS-.op): Likewise.
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# (CFLAGS-.ob): Likewise.
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# (CFLAGS-.oS): Likewise.
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#
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diff -urN glibc-2.17-c758a686/string/Makefile glibc-2.17-c758a686/string/Makefile
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--- glibc-2.17-c758a686/string/Makefile 2013-02-27 18:07:34.618968703 -0500
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+++ glibc-2.17-c758a686/string/Makefile 2013-02-27 18:08:16.075796160 -0500
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@@ -78,6 +78,14 @@
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CFLAGS-bug-strstr1.c = -fno-builtin
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CFLAGS-bug-strcasestr1.c = -fno-builtin
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+# Disable any optimization which might result in function calls to the very
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+# same functions we are trying to compile, thus creating an infinite loop.
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+CFLAGS-.o += -fno-tree-loop-distribute-patterns
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+CFLAGS-.os += -fno-tree-loop-distribute-patterns
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+CFLAGS-.op += -fno-tree-loop-distribute-patterns
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+CFLAGS-.ob += -fno-tree-loop-distribute-patterns
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+CFLAGS-.oS += -fno-tree-loop-distribute-patterns
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+
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ifeq ($(run-built-tests),yes)
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tests: $(objpfx)tst-svc.out
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$(objpfx)tst-svc.out: tst-svc.input $(objpfx)tst-svc
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diff -urN glibc-2.17-c758a686/elf/Makefile glibc-2.17-c758a686/elf/Makefile
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--- glibc-2.17-c758a686/elf/Makefile 2013-02-27 18:07:13.812055613 -0500
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+++ glibc-2.17-c758a686/elf/Makefile 2013-02-27 18:08:16.075796160 -0500
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@@ -432,6 +432,16 @@
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CPPFLAGS-.os += $(if $(filter $(@F),$(patsubst %,%.os,$(all-rtld-routines))),\
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-DNOT_IN_libc=1 -DIS_IN_rtld=1 -DIN_LIB=rtld)
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+# Disable any optimization which might result in function calls during early
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+# dynamic loader startup. We disable -ftree-loop-distribute-patterns which
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+# might convert code into calls to functions like memcpy or memset when the PLT
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+# is not yet setup.
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+CFLAGS-.o += -fno-tree-loop-distribute-patterns
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+CFLAGS-.os += -fno-tree-loop-distribute-patterns
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+CFLAGS-.op += -fno-tree-loop-distribute-patterns
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+CFLAGS-.ob += -fno-tree-loop-distribute-patterns
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+CFLAGS-.oS += -fno-tree-loop-distribute-patterns
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+
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test-modules = $(addprefix $(objpfx),$(addsuffix .so,$(strip $(modules-names))))
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generated += $(addsuffix .so,$(strip $(modules-names)))
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