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Diffstat (limited to 't/am-prog-cc-c-o.sh')
-rw-r--r-- | t/am-prog-cc-c-o.sh | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/t/am-prog-cc-c-o.sh b/t/am-prog-cc-c-o.sh new file mode 100644 index 000000000..08522a472 --- /dev/null +++ b/t/am-prog-cc-c-o.sh @@ -0,0 +1,126 @@ +#! /bin/sh +# Copyright (C) 2013 Free Software Foundation, Inc. +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2, or (at your option) +# any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see <http://www.gnu.org/licenses/>. + +# Check that uses of the obsolescent AM_PROG_CC_C_O macro doesn't +# cause spurious warnings or errors. Suggested by Eric Blake. + +# We need gcc for for two reasons: +# 1. to ensure our C compiler grasps "-c -o" together. +# 2. to be able to later fake a dumb compiler not grasping that +# (done with 'cc-no-c-o' script below, which required gcc). +required=gcc +. test-init.sh + +echo bin_PROGRAMS = foo > Makefile.am +echo 'int main (void) { return 0; }' > foo.c + +cp configure.ac configure.bak + +cat > acinclude.m4 <<'END' +AC_DEFUN([AM_TWEAKED_OUTPUT], [ +# For debugging. +printf "CC = '%s'\\n" "$CC" +# Make sure that $CC can be used after AM_PROG_CC_C_O. +$CC --version || exit 1 +$CC -v || exit 1 +# $CC rewrite should only take place on time. +case " $CC " in + *" compile"*" compile"*) AC_MSG_ERROR([CC rewritten twice]);; +esac +AC_OUTPUT +]) +END + +# --- + +cat configure.bak - > configure.ac << 'END' +dnl It's OK to call AM_PROG_CC_C_O after AC_PROG_CC. +AC_PROG_CC +AM_PROG_CC_C_O +AM_TWEAKED_OUTPUT +END + +$ACLOCAL +$AUTOCONF +$AUTOMAKE --add-missing + +./configure >stdout || { cat stdout; exit 1; } +cat stdout +if test "$AM_TESTSUITE_SIMULATING_NO_CC_C_O" != no; then + $EGREP 'understands? -c and -o together.* no$' stdout +else + $EGREP 'understands? -c and -o together.* yes$' stdout +fi + +# No repeated checks please. +test $(grep -c ".*-c['\" ].*-o['\" ]" stdout) -eq 1 + +$MAKE +$MAKE maintainer-clean +rm -rf autom4te*.cache + +# --- + +cat configure.bak - > configure.ac << 'END' +dnl It's also OK to call AM_PROG_CC_C_O *before* AC_PROG_CC. +AM_PROG_CC_C_O +AC_PROG_CC +AM_TWEAKED_OUTPUT +END + +$ACLOCAL +$AUTOCONF +$AUTOMAKE --add-missing + +./configure >stdout || { cat stdout; exit 1; } +cat stdout +if test "$AM_TESTSUITE_SIMULATING_NO_CC_C_O" != no; then + $EGREP 'understands? -c and -o together.* no$' stdout +else + $EGREP 'understands? -c and -o together.* yes$' stdout +fi + +# Repeated checks are OK in this case, but should be cached. +test $(grep ".*-c['\" ].*-o['\" ]" stdout \ + | $FGREP -v ' (cached) ' | wc -l) -eq 1 + +$MAKE +$MAKE maintainer-clean +rm -rf autom4te*.cache + +# --- + +cat configure.bak - > configure.ac << 'END' +dnl It's also OK to call AM_PROG_CC_C_O *without* AC_PROG_CC. +AM_PROG_CC_C_O +AM_TWEAKED_OUTPUT +END + +$ACLOCAL +$AUTOCONF +$AUTOMAKE --add-missing + +# Make sure the compiler doesn't understand '-c -o' +CC=$am_testaux_builddir/cc-no-c-o; export CC + +./configure >stdout || { cat stdout; exit 1; } +cat stdout +$EGREP 'understands? -c and -o together.* no$' stdout +# No repeated checks please. +test $(grep -c ".*-c['\" ].*-o['\" ]" stdout) -eq 1 +$MAKE + +: |