diff --git a/configure.ac b/configure.ac index cd0c9e6ec0..5aaecbaa0a 100644 --- a/configure.ac +++ b/configure.ac @@ -168,7 +168,10 @@ rb_test_CFLAGS=${CFLAGS+yes} rb_test_CXXFLAGS=${CXXFLAGS+yes} # BSD's ports and MacPorts prefix GNU binutils with 'g' -# AC_PROG_CC_C99 + +dnl Seems necessarily in order to add -std=gnu99 option for gcc 4.9. +m4_version_prereq([2.70], [], [AC_PROG_CC_C99]) + AC_PROG_CXX AC_PROG_CPP AC_PROG_RANLIB