diff options
Diffstat (limited to 'm4/odp_check_flag.m4')
| -rw-r--r-- | m4/odp_check_flag.m4 | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/m4/odp_check_flag.m4 b/m4/odp_check_flag.m4 new file mode 100644 index 000000000..012997ff2 --- /dev/null +++ b/m4/odp_check_flag.m4 @@ -0,0 +1,36 @@ +# SPDX-License-Identifier: BSD-3-Clause +# Copyright (c) 2018 Linaro Limited +# + +dnl Use -Werror in the checks below since Clang emits a warning instead of +dnl an error when it encounters an unknown warning option. + +# ODP_CHECK_CFLAG(FLAG) +# --------------------- +# Add FLAG to ODP_CFLAGS if compiler supports that option +AC_DEFUN([ODP_CHECK_CFLAG], +[ + AC_MSG_CHECKING([if $CC supports $1]) + AC_LANG_PUSH([C]) + saved_cflags="$CFLAGS" + CFLAGS="-W -Wall -Werror $ODP_CFLAGS $1" + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])], + [AC_MSG_RESULT([yes]) + ODP_CFLAGS="$ODP_CFLAGS $1"], + [AC_MSG_RESULT([no])]) + CFLAGS="$saved_cflags" + AC_LANG_POP([C])]) + +# ODP_CHECK_CXXFLAG(FLAG) +# --------------------- +AC_DEFUN([ODP_CHECK_CXXFLAG], +[ AC_MSG_CHECKING([if $CXX supports $1]) + AC_LANG_PUSH([C++]) + saved_cxxflags="$CXXFLAGS" + CXXFLAGS="-W -Wall -Werror $ODP_CXXFLAGS $1" + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])], + [AC_MSG_RESULT([yes]) + ODP_CXXFLAGS="$ODP_CXXFLAGS $1"], + [AC_MSG_RESULT([no])]) + CXXFLAGS="$saved_cxxflags" + AC_LANG_POP([C++])]) |