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Merge pull request flatpak#22 from atsampson/axfixes
Add missing ax_check_gnu_make.m4
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,95 @@ | ||
| # =========================================================================== | ||
| # https://www.gnu.org/software/autoconf-archive/ax_check_gnu_make.html | ||
| # =========================================================================== | ||
| # | ||
| # SYNOPSIS | ||
| # | ||
| # AX_CHECK_GNU_MAKE([run-if-true],[run-if-false]) | ||
| # | ||
| # DESCRIPTION | ||
| # | ||
| # This macro searches for a GNU version of make. If a match is found: | ||
| # | ||
| # * The makefile variable `ifGNUmake' is set to the empty string, otherwise | ||
| # it is set to "#". This is useful for including a special features in a | ||
| # Makefile, which cannot be handled by other versions of make. | ||
| # * The makefile variable `ifnGNUmake' is set to #, otherwise | ||
| # it is set to the empty string. This is useful for including a special | ||
| # features in a Makefile, which can be handled | ||
| # by other versions of make or to specify else like clause. | ||
| # * The variable `_cv_gnu_make_command` is set to the command to invoke | ||
| # GNU make if it exists, the empty string otherwise. | ||
| # * The variable `ax_cv_gnu_make_command` is set to the command to invoke | ||
| # GNU make by copying `_cv_gnu_make_command`, otherwise it is unset. | ||
| # * If GNU Make is found, its version is extracted from the output of | ||
| # `make --version` as the last field of a record of space-separated | ||
| # columns and saved into the variable `ax_check_gnu_make_version`. | ||
| # * Additionally if GNU Make is found, run shell code run-if-true | ||
| # else run shell code run-if-false. | ||
| # | ||
| # Here is an example of its use: | ||
| # | ||
| # Makefile.in might contain: | ||
| # | ||
| # # A failsafe way of putting a dependency rule into a makefile | ||
| # $(DEPEND): | ||
| # $(CC) -MM $(srcdir)/*.c > $(DEPEND) | ||
| # | ||
| # @ifGNUmake@ ifeq ($(DEPEND),$(wildcard $(DEPEND))) | ||
| # @ifGNUmake@ include $(DEPEND) | ||
| # @ifGNUmake@ else | ||
| # fallback code | ||
| # @ifGNUmake@ endif | ||
| # | ||
| # Then configure.in would normally contain: | ||
| # | ||
| # AX_CHECK_GNU_MAKE() | ||
| # AC_OUTPUT(Makefile) | ||
| # | ||
| # Then perhaps to cause gnu make to override any other make, we could do | ||
| # something like this (note that GNU make always looks for GNUmakefile | ||
| # first): | ||
| # | ||
| # if ! test x$_cv_gnu_make_command = x ; then | ||
| # mv Makefile GNUmakefile | ||
| # echo .DEFAULT: > Makefile ; | ||
| # echo \ $_cv_gnu_make_command \$@ >> Makefile; | ||
| # fi | ||
| # | ||
| # Then, if any (well almost any) other make is called, and GNU make also | ||
| # exists, then the other make wraps the GNU make. | ||
| # | ||
| # LICENSE | ||
| # | ||
| # Copyright (c) 2008 John Darrington <[email protected]> | ||
| # Copyright (c) 2015 Enrico M. Crisostomo <[email protected]> | ||
| # | ||
| # Copying and distribution of this file, with or without modification, are | ||
| # permitted in any medium without royalty provided the copyright notice | ||
| # and this notice are preserved. This file is offered as-is, without any | ||
| # warranty. | ||
|
|
||
| #serial 12 | ||
|
|
||
| AC_DEFUN([AX_CHECK_GNU_MAKE],dnl | ||
| [AC_PROG_AWK | ||
| AC_CACHE_CHECK([for GNU make],[_cv_gnu_make_command],[dnl | ||
| _cv_gnu_make_command="" ; | ||
| dnl Search all the common names for GNU make | ||
| for a in "$MAKE" make gmake gnumake ; do | ||
| if test -z "$a" ; then continue ; fi ; | ||
| if "$a" --version 2> /dev/null | grep GNU 2>&1 > /dev/null ; then | ||
| _cv_gnu_make_command=$a ; | ||
| AX_CHECK_GNU_MAKE_HEADLINE=$("$a" --version 2> /dev/null | grep "GNU Make") | ||
| ax_check_gnu_make_version=$(echo ${AX_CHECK_GNU_MAKE_HEADLINE} | ${AWK} -F " " '{ print $(NF); }') | ||
| break ; | ||
| fi | ||
| done ;]) | ||
| dnl If there was a GNU version, then set @ifGNUmake@ to the empty string, '#' otherwise | ||
| AS_VAR_IF([_cv_gnu_make_command], [""], [AS_VAR_SET([ifGNUmake], ["#"])], [AS_VAR_SET([ifGNUmake], [""])]) | ||
| AS_VAR_IF([_cv_gnu_make_command], [""], [AS_VAR_SET([ifnGNUmake], [""])], [AS_VAR_SET([ifnGNUmake], ["#"])]) | ||
| AS_VAR_IF([_cv_gnu_make_command], [""], [AS_UNSET(ax_cv_gnu_make_command)], [AS_VAR_SET([ax_cv_gnu_make_command], [${_cv_gnu_make_command}])]) | ||
| AS_VAR_IF([_cv_gnu_make_command], [""],[$2],[$1]) | ||
| AC_SUBST([ifGNUmake]) | ||
| AC_SUBST([ifnGNUmake]) | ||
| ]) |
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