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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"
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<title>
Autoconf Macro: ac_prog_cc_warnings
</title>
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M4 Source</a>
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<hr>
<h1>
ac_prog_cc_warnings
</h1>
<h2>
Obsolete Macro
</h2>
<p class="indent">
Renamed to VL_PROG_CC_WARNINGS, or use AX_CFLAGS_WARN_ALL.
</p>
<h2>
Synopsis
</h2>
<p class="indent" style="white-space:nowrap;">
<code>AC_PROG_CC_WARNINGS([ANSI])</code>
</p>
<h2>
Description
</h2>
<div class="indent">
<p>
Enables a reasonable set of warnings for the C compiler. Optionally, if the
first argument is nonempty, turns on flags which enforce and/or enable
proper ANSI C if such are known with the compiler used.
</p>
<p>
Currently this macro knows about GCC, Solaris C compiler, Digital Unix C
compiler, C for AIX Compiler, HP-UX C compiler, IRIX C compiler, NEC SX-5
(Super-UX 10) C compiler, and Cray J90 (Unicos 10.0.0.8) C compiler.
</p>
</div>
<h2>
Author
</h2>
<p class="indent">
Ville Laurikari <vl@iki.fi>
</p>
<h2>
Last Modified
</h2>
<p class="indent">
2005-01-25
</p>
<h2>
M4 Source Code
</h2>
<div class="indent">
<pre class="m4source">
AC_DEFUN([AC_PROG_CC_WARNINGS], [
ansi=$1
if test -z "$ansi"; then
msg="for C compiler warning flags"
else
msg="for C compiler warning and ANSI conformance flags"
fi
AC_CACHE_CHECK($msg, ac_cv_prog_cc_warnings, [
if test -n "$CC"; then
cat > conftest.c <<EOF
int main(int argc, char **argv) { return 0; }
EOF
dnl GCC
if test "$GCC" = "yes"; then
if test -z "$ansi"; then
ac_cv_prog_cc_warnings="-Wall"
else
ac_cv_prog_cc_warnings="-Wall -ansi -pedantic"
fi
dnl Solaris C compiler
elif $CC -flags 2>&1 | grep "Xc.*strict ANSI C" > /dev/null 2>&1 &&
$CC -c -v -Xc conftest.c > /dev/null 2>&1 &&
test -f conftest.o; then
if test -z "$ansi"; then
ac_cv_prog_cc_warnings="-v"
else
ac_cv_prog_cc_warnings="-v -Xc"
fi
dnl HP-UX C compiler
elif $CC > /dev/null 2>&1 &&
$CC -c -Aa +w1 conftest.c > /dev/null 2>&1 &&
test -f conftest.o; then
if test -z "$ansi"; then
ac_cv_prog_cc_warnings="+w1"
else
ac_cv_prog_cc_warnings="+w1 -Aa"
fi
dnl Digital Unix C compiler
elif $CC -c -verbose -w0 -warnprotos -std1 conftest.c > /dev/null 2>&1 &&
test -f conftest.o; then
if test -z "$ansi"; then
ac_cv_prog_cc_warnings="-verbose -w0 -warnprotos"
else
ac_cv_prog_cc_warnings="-verbose -w0 -warnprotos -std1"
fi
dnl C for AIX Compiler
elif $CC 2>&1 | grep AIX > /dev/null 2>&1 &&
$CC -c -qlanglvl=ansi -qinfo=all conftest.c > /dev/null 2>&1 &&
test -f conftest.o; then
if test -z "$ansi"; then
ac_cv_prog_cc_warnings="-qsrcmsg -qinfo=all:noppt:noppc:noobs:nocnd"
else
ac_cv_prog_cc_warnings="-qsrcmsg -qinfo=all:noppt:noppc:noobs:nocnd -qlanglvl=ansi"
fi
dnl IRIX C compiler
elif $CC -c -fullwarn -ansi -ansiE conftest.c > /dev/null 2>&1 &&
test -f conftest.o; then
if test -z "$ansi"; then
ac_cv_prog_cc_warnings="-fullwarn"
else
ac_cv_prog_cc_warnings="-fullwarn -ansi -ansiE"
fi
dnl The NEC SX-5 (Super-UX 10) C compiler
elif $CC -c -pvctl[,]fullmsg -Xc conftest.c > /dev/null 2>&1 &&
test -f conftest.o; then
if test -z "$ansi"; then
ac_cv_prog_cc_warnings="-pvctl[,]fullmsg"
else
ac_cv_prog_cc_warnings="-pvctl[,]fullmsg -Xc"
fi
dnl The Cray J90 (Unicos 10.0.0.8) C compiler
elif $CC -c -h msglevel 2 conftest.c > /dev/null 2>&1 &&
test -f conftest.o; then
if test -z "$ansi"; then
ac_cv_prog_cc_warnings="-h msglevel 2"
else
ac_cv_prog_cc_warnings="-h msglevel 2 -h conform"
fi
fi
rm -f conftest.*
fi
if test -n "$ac_cv_prog_cc_warnings"; then
CFLAGS="$CFLAGS $ac_cv_prog_cc_warnings"
else
ac_cv_prog_cc_warnings="unknown"
fi
])
])
</pre>
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