127 lines
3.2 KiB
Bash
127 lines
3.2 KiB
Bash
#! /bin/sh
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# Copyright (C) 2013-2017 Free Software Foundation, Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2, or (at your option)
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# any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# Check that uses of the obsolescent AM_PROG_CC_C_O macro doesn't
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# cause spurious warnings or errors. Suggested by Eric Blake.
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# We need gcc for for two reasons:
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# 1. to ensure our C compiler grasps "-c -o" together.
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# 2. to be able to later fake a dumb compiler not grasping that
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# (done with 'cc-no-c-o' script below, which required gcc).
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required=gcc
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. test-init.sh
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echo bin_PROGRAMS = foo > Makefile.am
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echo 'int main (void) { return 0; }' > foo.c
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cp configure.ac configure.bak
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cat > acinclude.m4 <<'END'
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AC_DEFUN([AM_TWEAKED_OUTPUT], [
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# For debugging.
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printf "CC = '%s'\\n" "$CC"
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# Make sure that $CC can be used after AM_PROG_CC_C_O.
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$CC --version || exit 1
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$CC -v || exit 1
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# $CC rewrite should only take place on time.
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case " $CC " in
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*" compile"*" compile"*) AC_MSG_ERROR([CC rewritten twice]);;
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esac
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AC_OUTPUT
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])
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END
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# ---
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cat configure.bak - > configure.ac << 'END'
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dnl It's OK to call AM_PROG_CC_C_O after AC_PROG_CC.
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AC_PROG_CC
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AM_PROG_CC_C_O
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AM_TWEAKED_OUTPUT
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END
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$ACLOCAL
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$AUTOCONF
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$AUTOMAKE --add-missing
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./configure >stdout || { cat stdout; exit 1; }
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cat stdout
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if test "$AM_TESTSUITE_SIMULATING_NO_CC_C_O" != no; then
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$EGREP 'understands? -c and -o together.* no$' stdout
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else
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$EGREP 'understands? -c and -o together.* yes$' stdout
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fi
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# No repeated checks please.
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test $(grep -c ".*-c['\" ].*-o['\" ]" stdout) -eq 1
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$MAKE
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$MAKE maintainer-clean
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rm -rf autom4te*.cache
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# ---
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cat configure.bak - > configure.ac << 'END'
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dnl It's also OK to call AM_PROG_CC_C_O *before* AC_PROG_CC.
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AM_PROG_CC_C_O
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AC_PROG_CC
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AM_TWEAKED_OUTPUT
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END
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$ACLOCAL
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$AUTOCONF
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$AUTOMAKE --add-missing
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./configure >stdout || { cat stdout; exit 1; }
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cat stdout
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if test "$AM_TESTSUITE_SIMULATING_NO_CC_C_O" != no; then
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$EGREP 'understands? -c and -o together.* no$' stdout
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else
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$EGREP 'understands? -c and -o together.* yes$' stdout
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fi
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# Repeated checks are OK in this case, but should be cached.
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test $(grep ".*-c['\" ].*-o['\" ]" stdout \
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| $FGREP -v ' (cached) ' | wc -l) -eq 1
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$MAKE
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$MAKE maintainer-clean
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rm -rf autom4te*.cache
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# ---
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cat configure.bak - > configure.ac << 'END'
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dnl It's also OK to call AM_PROG_CC_C_O *without* AC_PROG_CC.
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AM_PROG_CC_C_O
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AM_TWEAKED_OUTPUT
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END
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$ACLOCAL
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$AUTOCONF
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$AUTOMAKE --add-missing
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# Make sure the compiler doesn't understand '-c -o'
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CC=$am_testaux_builddir/cc-no-c-o; export CC
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./configure >stdout || { cat stdout; exit 1; }
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cat stdout
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$EGREP 'understands? -c and -o together.* no$' stdout
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# No repeated checks please.
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test $(grep -c ".*-c['\" ].*-o['\" ]" stdout) -eq 1
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$MAKE
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:
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