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Use AC_PROG_CC_C99 to discover C99-compliant compiler.

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Instead of just checking if the compiler supports -std=c99 option,
make use of the autoconf macro for discovering C99. This way other
non-GCC compiler could be used in C99 mode too.
This commit is contained in:
Diego 'Flameeyes' Pettenò 2008-08-08 13:04:27 +02:00
parent f46ae106a5
commit a6e4507a4b
1 changed files with 2 additions and 4 deletions
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6
configure.ac
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@ -86,6 +86,7 @@ AC_PROG_MKDIR_P
# CC
AC_PROG_CC
AC_PROG_CC_C99
AM_PROG_CC_C_O
AC_PROG_GCC_TRADITIONAL
AC_GNU_SOURCE
@ -109,10 +110,7 @@ test_gcc_flag() {
# If using GCC specify some additional parameters
if test "x$GCC" = "xyes" ; then
# We use gnu99 instead of c99 because many have interpreted the standard
# in a way that int64_t isn't defined on non-64 bit platforms.
DESIRED_FLAGS="-std=gnu99 -Wall -W -Wextra -pedantic -pipe -Wformat -Wold-style-definition -Wdeclaration-after-statement -Wfloat-equal -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wredundant-decls -Wmissing-noreturn -Wshadow -Wendif-labels -Wpointer-arith -Wcast-align -Wwrite-strings -Winline -Wno-unused-parameter -ffast-math"
DESIRED_FLAGS="-Wall -W -Wextra -pedantic -pipe -Wformat -Wold-style-definition -Wdeclaration-after-statement -Wfloat-equal -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wredundant-decls -Wmissing-noreturn -Wshadow -Wendif-labels -Wpointer-arith -Wcast-align -Wwrite-strings -Winline -Wno-unused-parameter -ffast-math"
for flag in $DESIRED_FLAGS ; do
AC_MSG_CHECKING([whether $CC accepts $flag])