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Build glibc with -frounding-math 

* Makeconfig (+math-flags): New, set to -frounding-math.
	(+cflags): Add +math-flags so that all of glibc gets compiled with
	it.
This commit is contained in:
Andreas Jaeger 2012-05-06 09:14:15 +02:00
parent 5779f134a0
commit bd7b0e561f
2 changed files with 12 additions and 1 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
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.
2012-05-05 Joseph Myers <joseph@codesourcery.com>
* 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.
+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.
# 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.
@ -633,7 +638,7 @@ ifeq "$(strip $(+cflags))" ""
+cflags := $(default_cflags)
endif # $(+cflags) == ""
+cflags += $(cflags-cpu) $(+gccwarn) $(+merge-constants)
+cflags += $(cflags-cpu) $(+gccwarn) $(+merge-constants) $(+math-flags)
+gcc-nowarn := -w
# Don't duplicate options if we inherited variables from the parent.