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build-sys: Set C language standard to gnu11

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Per glibc feature_test_macros(7), setting compiler flags to
-std=c11 (or any c* variant like c99) enforces strict ANSI
mode.

Enforcing strict ANSI makes all declarations under _GNU_SOURCE
unavailable. This leads to build warnings in the form of:

    warning: implicit declaration of function ‘syscall’

Thus replace -std=c11 with -std=gnu11

Signed-off-by: Ahmed S. Darwish <darwish.07@gmail.com>
This commit is contained in:
Ahmed S. Darwish 2016-03-14 00:00:03 +02:00 • committed by Tanu Kaskinen
parent b5e5475d96
commit dcbe79bd63
2 changed files with 3 additions and 3 deletions
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4
configure.ac
View file

@ -176,9 +176,9 @@ esac
#### Compiler flags #### #### Compiler flags ####
AX_CHECK_COMPILE_FLAG([-std=c11], AX_CHECK_COMPILE_FLAG([-std=gnu11],
[], [],
[AC_MSG_ERROR([*** Compiler does not support -std=c11])], [AC_MSG_ERROR([*** Compiler does not support -std=gnu11])],
[-pedantic -Werror]) [-pedantic -Werror])
AX_APPEND_COMPILE_FLAGS( AX_APPEND_COMPILE_FLAGS(

2
src/Makefile.am
View file

@ -48,7 +48,7 @@ AM_CPPFLAGS = \
-DPA_SRCDIR=\"$(abs_srcdir)\" \ -DPA_SRCDIR=\"$(abs_srcdir)\" \
-DPA_BUILDDIR=\"$(abs_builddir)\" \ -DPA_BUILDDIR=\"$(abs_builddir)\" \
-DPULSE_LOCALEDIR=\"$(localedir)\" -DPULSE_LOCALEDIR=\"$(localedir)\"
AM_CFLAGS = -std=c11 \ AM_CFLAGS = -std=gnu11 \
$(PTHREAD_CFLAGS) $(PTHREAD_CFLAGS)
AM_CXXFLAGS = -std=c++11 \ AM_CXXFLAGS = -std=c++11 \
$(PTHREAD_CFLAGS) $(PTHREAD_CFLAGS)