Alex Chernyakhovsky
70a02d1e83
This change adds autoconf/automake support for building all of mosh with gcov, and generates an lcov html report. This allows seeing which parts ofthe source tree have good test coverage, and which can be shored up. Eventually, it would be good to hook this up to Github Actions to be generated automatically.
96 lines
4.0 KiB
Plaintext
96 lines
4.0 KiB
Plaintext
# ===========================================================================
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# https://www.gnu.org/software/autoconf-archive/ax_check_gnu_make.html
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# ===========================================================================
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#
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# SYNOPSIS
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#
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# AX_CHECK_GNU_MAKE([run-if-true],[run-if-false])
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#
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# DESCRIPTION
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#
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# This macro searches for a GNU version of make. If a match is found:
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#
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# * The makefile variable `ifGNUmake' is set to the empty string, otherwise
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# it is set to "#". This is useful for including a special features in a
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# Makefile, which cannot be handled by other versions of make.
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# * The makefile variable `ifnGNUmake' is set to #, otherwise
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# it is set to the empty string. This is useful for including a special
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# features in a Makefile, which can be handled
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# by other versions of make or to specify else like clause.
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# * The variable `_cv_gnu_make_command` is set to the command to invoke
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# GNU make if it exists, the empty string otherwise.
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# * The variable `ax_cv_gnu_make_command` is set to the command to invoke
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# GNU make by copying `_cv_gnu_make_command`, otherwise it is unset.
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# * If GNU Make is found, its version is extracted from the output of
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# `make --version` as the last field of a record of space-separated
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# columns and saved into the variable `ax_check_gnu_make_version`.
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# * Additionally if GNU Make is found, run shell code run-if-true
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# else run shell code run-if-false.
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#
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# Here is an example of its use:
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#
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# Makefile.in might contain:
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#
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# # A failsafe way of putting a dependency rule into a makefile
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# $(DEPEND):
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# $(CC) -MM $(srcdir)/*.c > $(DEPEND)
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#
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# @ifGNUmake@ ifeq ($(DEPEND),$(wildcard $(DEPEND)))
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# @ifGNUmake@ include $(DEPEND)
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# @ifGNUmake@ else
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# fallback code
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# @ifGNUmake@ endif
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#
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# Then configure.in would normally contain:
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#
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# AX_CHECK_GNU_MAKE()
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# AC_OUTPUT(Makefile)
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#
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# Then perhaps to cause gnu make to override any other make, we could do
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# something like this (note that GNU make always looks for GNUmakefile
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# first):
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#
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# if ! test x$_cv_gnu_make_command = x ; then
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# mv Makefile GNUmakefile
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# echo .DEFAULT: > Makefile ;
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# echo \ $_cv_gnu_make_command \$@ >> Makefile;
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# fi
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#
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# Then, if any (well almost any) other make is called, and GNU make also
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# exists, then the other make wraps the GNU make.
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#
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# LICENSE
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#
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# Copyright (c) 2008 John Darrington <j.darrington@elvis.murdoch.edu.au>
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# Copyright (c) 2015 Enrico M. Crisostomo <enrico.m.crisostomo@gmail.com>
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#
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# Copying and distribution of this file, with or without modification, are
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# permitted in any medium without royalty provided the copyright notice
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# and this notice are preserved. This file is offered as-is, without any
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# warranty.
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#serial 12
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AC_DEFUN([AX_CHECK_GNU_MAKE],dnl
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[AC_PROG_AWK
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AC_CACHE_CHECK([for GNU make],[_cv_gnu_make_command],[dnl
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_cv_gnu_make_command="" ;
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dnl Search all the common names for GNU make
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for a in "$MAKE" make gmake gnumake ; do
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if test -z "$a" ; then continue ; fi ;
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if "$a" --version 2> /dev/null | grep GNU 2>&1 > /dev/null ; then
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_cv_gnu_make_command=$a ;
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AX_CHECK_GNU_MAKE_HEADLINE=$("$a" --version 2> /dev/null | grep "GNU Make")
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ax_check_gnu_make_version=$(echo ${AX_CHECK_GNU_MAKE_HEADLINE} | ${AWK} -F " " '{ print $(NF); }')
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break ;
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fi
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done ;])
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dnl If there was a GNU version, then set @ifGNUmake@ to the empty string, '#' otherwise
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AS_VAR_IF([_cv_gnu_make_command], [""], [AS_VAR_SET([ifGNUmake], ["#"])], [AS_VAR_SET([ifGNUmake], [""])])
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AS_VAR_IF([_cv_gnu_make_command], [""], [AS_VAR_SET([ifnGNUmake], [""])], [AS_VAR_SET([ifnGNUmake], ["#"])])
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AS_VAR_IF([_cv_gnu_make_command], [""], [AS_UNSET(ax_cv_gnu_make_command)], [AS_VAR_SET([ax_cv_gnu_make_command], [${_cv_gnu_make_command}])])
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AS_VAR_IF([_cv_gnu_make_command], [""],[$2],[$1])
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AC_SUBST([ifGNUmake])
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AC_SUBST([ifnGNUmake])
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])
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