From 3a39d63356c936e07539c648409d4c5d20e5e696 Mon Sep 17 00:00:00 2001 From: Michael Steinert Date: Tue, 15 May 2012 17:25:09 -0600 Subject: Add -Wall, -Wextra & -pedantic by default This change also adds a couple small autoconf macros to make it easier to deal with compiler options. Signed-off-by: Michael Steinert --- m4/cflags.m4 | 59 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) create mode 100644 m4/cflags.m4 (limited to 'm4/cflags.m4') diff --git a/m4/cflags.m4 b/m4/cflags.m4 new file mode 100644 index 0000000..015d07b --- /dev/null +++ b/m4/cflags.m4 @@ -0,0 +1,59 @@ +# cflags.m4 - Test and set compiler flags +# +# Copyright 2011, 2012 Michael Steinert +# +# Permission is hereby granted, free of charge, to any person obtaining +# a copy of this software and associated documentation files (the +# "Software"), to deal in the Software without restriction, including +# without limitation the rights to use, copy, modify, merge, publish, +# distribute, sublicense, and/or sell copies of the Software, and to +# permit persons to whom the Software is furnished to do so, subject to +# the following conditions: +# +# The above copyright notice and this permission notice shall be +# included in all copies or substantial portions of the Software. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF, +# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT +# SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, +# DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR +# OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR +# THE USE OR OTHER DEALINGS IN THE SOFTWARE. + +#serial 1 + +# AX_TRY_CFLAGS(FLAG, [ACTION-IF-TRUE], [ACTION-IF-FALSE]) +# -------------------------------------------------------- +# Test a compiler flag is supported. +# FLAG: a compiler flag to try +# ACTION-IF-TRUE: commands to execute if FLAG is supported +# ACTION-IF-FALSE: commands to execute if FLAG is not supported +AC_DEFUN([AX_TRY_CFLAGS], +[dnl +AC_REQUIRE([AC_PROG_CC]) +_ax_cflags=$CFLAGS +CFLAGS="$1 $CFLAGS" +AC_MSG_CHECKING([if compiler accepts '$1']) +AC_TRY_COMPILE([], [], + [AC_MSG_RESULT([yes]) + CFLAGS=$_ax_cflags + $2], + [AC_MSG_RESULT([no]) + CFLAGS=$_ax_cflags + $3]) +])dnl + +# AX_CFLAGS(FLAGS) +# ---------------- +# Enable compiler flags. +# FLAGS: a whitespace-separated list of compiler flags to set +AC_DEFUN([AX_CFLAGS], +[dnl +m4_foreach_w([_ax_flag], [$1], + [AS_CASE([" $CFLAGS "], + [*[[\ \ ]]_ax_flag[[\ \ ]]*], + [], + [*], + [CFLAGS="$CFLAGS _ax_flag"])]) +])dnl -- cgit v1.2.1