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Revert "Revert "Build glibc with -frounding-math"" 

This reverts commit 20f244a03f.
This commit is contained in:
Andreas Jaeger 2012-05-08 09:00:44 +02:00
parent abb66a672f
commit 29ba805c7b
2 changed files with 14 additions and 1 deletions
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8
ChangeLog
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@ -86,6 +86,14 @@
* math/libm-test.inc (check_float_internal): Correct ulp * math/libm-test.inc (check_float_internal): Correct ulp
calculation for subnormal expected results. calculation for subnormal expected results.
2012-05-06 Andreas Jaeger <aj@suse.de>
* Makeconfig (+math-flags): New, set to -frounding-math.
(+cflags): Add +math-flags so that all of glibc gets compiled with
it.
* sysdeps/x86_64/fpu/libm-test-ulps: Updated.
2012-05-05 Joseph Myers <joseph@codesourcery.com> 2012-05-05 Joseph Myers <joseph@codesourcery.com>
* math/libm-test.inc (hypot_test) [TEST_DOUBLE && TEST_INLINE]: * math/libm-test.inc (hypot_test) [TEST_DOUBLE && TEST_INLINE]:

7
Makeconfig
View File

@ -574,6 +574,11 @@ endif
# actually different, so allow the compiler to merge them all. # actually different, so allow the compiler to merge them all.
+merge-constants = -fmerge-all-constants +merge-constants = -fmerge-all-constants
# We have to assume that glibc functions are called in any rounding
# mode and also change the rounding mode in a few functions. So,
# disable any optimization that assume default rounding mode.
+math-flags = -frounding-math
# This is the program that generates makefile dependencies from C source files. # This is the program that generates makefile dependencies from C source files.
# The -MP flag tells GCC >= 3.2 (which we now require) to produce dummy # The -MP flag tells GCC >= 3.2 (which we now require) to produce dummy
# targets for headers so that removed headers don't break the build. # targets for headers so that removed headers don't break the build.
@ -633,7 +638,7 @@ ifeq "$(strip $(+cflags))" ""
+cflags := $(default_cflags) +cflags := $(default_cflags)
endif # $(+cflags) == "" endif # $(+cflags) == ""
+cflags += $(cflags-cpu) $(+gccwarn) $(+merge-constants) +cflags += $(cflags-cpu) $(+gccwarn) $(+merge-constants) $(+math-flags)
+gcc-nowarn := -w +gcc-nowarn := -w
# Don't duplicate options if we inherited variables from the parent. # Don't duplicate options if we inherited variables from the parent.