1 AC_DEFUN([AC_PROG_CC_PIE], [ 2 AC_CACHE_CHECK([whether ${CC-cc} accepts -fPIE], ac_cv_prog_cc_pie, [ 3 echo 'void f(){}' > conftest.c 4 if test -z "`${CC-cc} -fPIE -pie -c conftest.c 2>&1`"; then 5 ac_cv_prog_cc_pie=yes 6 else 7 ac_cv_prog_cc_pie=no 8 fi 9 rm -rf conftest* 10 ]) 11 ]) 12 13 AC_DEFUN([COMPILER_FLAGS], [ 14 if (test "${CFLAGS}" = ""); then 15 CFLAGS="-Wall -O2 -D_FORTIFY_SOURCE=2" 16 fi 17 if (test "$USE_MAINTAINER_MODE" = "yes"); then 18 CFLAGS+=" -Wextra" 19 CFLAGS+=" -Wno-unused-parameter" 20 CFLAGS+=" -Wno-missing-field-initializers" 21 CFLAGS+=" -Wdeclaration-after-statement" 22 CFLAGS+=" -Wmissing-declarations" 23 CFLAGS+=" -Wredundant-decls" 24 CFLAGS+=" -Wcast-align" 25 fi 26 ]) 27
