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-rw-r--r--configure.ac3
1 files changed, 2 insertions, 1 deletions
diff --git a/configure.ac b/configure.ac
index 00a3910..b76b6d5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -37,6 +37,7 @@ fi
# Checks for programs.
AC_PROG_CC
+AC_PROG_CC_C99
AC_PROG_CPP
AC_USE_SYSTEM_EXTENSIONS
@@ -57,7 +58,7 @@ test_gcc_flag() {
# If using GCC specify some additional parameters
if test "x$GCC" = "xyes" ; then
- DESIRED_FLAGS="-std=c99 -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 -Wbad-function-cast -Wcast-qual -Wcast-align -Wwrite-strings -Winline -Wno-unused-parameter"
+ 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 -Wbad-function-cast -Wcast-qual -Wcast-align -Wwrite-strings -Winline -Wno-unused-parameter"
for flag in $DESIRED_FLAGS ; do
AC_MSG_CHECKING([whether $CC accepts $flag])