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build: Add -U__STRICT_ANSI__ to CFLAGS on Cygwin

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Cygwin's libc (newlib) doesn't obey a lot of unix feature test macros,
including _GNU_SOURCE; as a result, a lot of functions and defines get
masked out -- important defines such as M_PI and strcasecmp. Work around
it by undefining __STRICT_ANSI__ on cygwin systems.

This will still cause compilation issues on any non-cygwin system that
uses newlib, but hopefully nobody does that, or if they do, they will
find this commit message and know to add -U__STRICT_ANSI__ to their
CFLAGS. Hopefully.
This commit is contained in:
Diogo Franco (Kovensky) 2014-02-13 19:29:23 -03:00 committed by wm4
parent e4c69376fc
commit c4d905b567
1 changed files with 1 additions and 0 deletions
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waftools/detections/compiler.py
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@ -40,6 +40,7 @@ def __add_mingw_flags__(ctx):
def __add_cygwin_flags__(ctx):
ctx.env.CFLAGS += ['-mwin32']
ctx.env.CFLAGS += ['-U__STRICT_ANSI__']
__compiler_map__ = {
'__GNUC__': __add_gcc_flags__,