# Initialize some other variables.
subdirs=
MFLAGS= MAKEFLAGS=
-SHELL=${CONFIG_SHELL-/bin/sh}
# Maximum number of lines to put in a shell here document.
ac_max_here_lines=12
fi
echo $ac_n "checking host system type""... $ac_c" 1>&6
-echo "configure:713: checking host system type" >&5
+echo "configure:712: checking host system type" >&5
host_alias=$host
case "$host_alias" in
echo "$ac_t""$host" 1>&6
echo $ac_n "checking target system type""... $ac_c" 1>&6
-echo "configure:734: checking target system type" >&5
+echo "configure:733: checking target system type" >&5
target_alias=$target
case "$target_alias" in
echo "$ac_t""$target" 1>&6
echo $ac_n "checking build system type""... $ac_c" 1>&6
-echo "configure:752: checking build system type" >&5
+echo "configure:751: checking build system type" >&5
build_alias=$build
case "$build_alias" in
# Extract the first word of "gcc", so it can be a program name with args.
set dummy gcc; ac_word=$2
echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:779: checking for $ac_word" >&5
+echo "configure:778: checking for $ac_word" >&5
if eval "test \"`echo '$''{'ac_cv_prog_CC'+set}'`\" = set"; then
echo $ac_n "(cached) $ac_c" 1>&6
else
# Extract the first word of "cc", so it can be a program name with args.
set dummy cc; ac_word=$2
echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:808: checking for $ac_word" >&5
+echo "configure:807: checking for $ac_word" >&5
if eval "test \"`echo '$''{'ac_cv_prog_CC'+set}'`\" = set"; then
echo $ac_n "(cached) $ac_c" 1>&6
else
fi
echo $ac_n "checking whether the C compiler ($CC $CFLAGS $LDFLAGS) works""... $ac_c" 1>&6
-echo "configure:856: checking whether the C compiler ($CC $CFLAGS $LDFLAGS) works" >&5
+echo "configure:855: checking whether the C compiler ($CC $CFLAGS $LDFLAGS) works" >&5
ac_ext=c
# CFLAGS is not in ac_cpp because -g, -O, etc. are not valid cpp options.
cross_compiling=$ac_cv_prog_cc_cross
cat > conftest.$ac_ext <<EOF
-#line 866 "configure"
+#line 865 "configure"
#include "confdefs.h"
main(){return(0);}
EOF
-if { (eval echo configure:870: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
+if { (eval echo configure:869: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
ac_cv_prog_cc_works=yes
# If we can't run a trivial program, we are probably using a cross compiler.
if (./conftest; exit) 2>/dev/null; then
{ echo "configure: error: installation or configuration problem: C compiler cannot create executables." 1>&2; exit 1; }
fi
echo $ac_n "checking whether the C compiler ($CC $CFLAGS $LDFLAGS) is a cross-compiler""... $ac_c" 1>&6
-echo "configure:890: checking whether the C compiler ($CC $CFLAGS $LDFLAGS) is a cross-compiler" >&5
+echo "configure:889: checking whether the C compiler ($CC $CFLAGS $LDFLAGS) is a cross-compiler" >&5
echo "$ac_t""$ac_cv_prog_cc_cross" 1>&6
cross_compiling=$ac_cv_prog_cc_cross
echo $ac_n "checking whether we are using GNU C""... $ac_c" 1>&6
-echo "configure:895: checking whether we are using GNU C" >&5
+echo "configure:894: checking whether we are using GNU C" >&5
if eval "test \"`echo '$''{'ac_cv_prog_gcc'+set}'`\" = set"; then
echo $ac_n "(cached) $ac_c" 1>&6
else
yes;
#endif
EOF
-if { ac_try='${CC-cc} -E conftest.c'; { (eval echo configure:904: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; } | egrep yes >/dev/null 2>&1; then
+if { ac_try='${CC-cc} -E conftest.c'; { (eval echo configure:903: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; } | egrep yes >/dev/null 2>&1; then
ac_cv_prog_gcc=yes
else
ac_cv_prog_gcc=no
ac_save_CFLAGS="$CFLAGS"
CFLAGS=
echo $ac_n "checking whether ${CC-cc} accepts -g""... $ac_c" 1>&6
-echo "configure:919: checking whether ${CC-cc} accepts -g" >&5
+echo "configure:918: checking whether ${CC-cc} accepts -g" >&5
if eval "test \"`echo '$''{'ac_cv_prog_cc_g'+set}'`\" = set"; then
echo $ac_n "(cached) $ac_c" 1>&6
else
fi
echo $ac_n "checking whether ${MAKE-make} sets \${MAKE}""... $ac_c" 1>&6
-echo "configure:947: checking whether ${MAKE-make} sets \${MAKE}" >&5
+echo "configure:946: checking whether ${MAKE-make} sets \${MAKE}" >&5
set dummy ${MAKE-make}; ac_make=`echo "$2" | sed 'y%./+-%__p_%'`
if eval "test \"`echo '$''{'ac_cv_prog_make_${ac_make}_set'+set}'`\" = set"; then
echo $ac_n "(cached) $ac_c" 1>&6
# Extract the first word of "$ac_prog", so it can be a program name with args.
set dummy $ac_prog; ac_word=$2
echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:980: checking for $ac_word" >&5
+echo "configure:979: checking for $ac_word" >&5
if eval "test \"`echo '$''{'ac_cv_prog_AWK'+set}'`\" = set"; then
echo $ac_n "(cached) $ac_c" 1>&6
else
# Extract the first word of "flex", so it can be a program name with args.
set dummy flex; ac_word=$2
echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:1011: checking for $ac_word" >&5
+echo "configure:1010: checking for $ac_word" >&5
if eval "test \"`echo '$''{'ac_cv_prog_LEX'+set}'`\" = set"; then
echo $ac_n "(cached) $ac_c" 1>&6
else
*) ac_lib=l ;;
esac
echo $ac_n "checking for yywrap in -l$ac_lib""... $ac_c" 1>&6
-echo "configure:1044: checking for yywrap in -l$ac_lib" >&5
+echo "configure:1043: checking for yywrap in -l$ac_lib" >&5
ac_lib_var=`echo $ac_lib'_'yywrap | sed 'y%./+-%__p_%'`
if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
echo $ac_n "(cached) $ac_c" 1>&6
ac_save_LIBS="$LIBS"
LIBS="-l$ac_lib $LIBS"
cat > conftest.$ac_ext <<EOF
-#line 1052 "configure"
+#line 1051 "configure"
#include "confdefs.h"
/* Override any gcc2 internal prototype to avoid an error. */
/* We use char because int might match the return type of a gcc2
yywrap()
; return 0; }
EOF
-if { (eval echo configure:1063: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
+if { (eval echo configure:1062: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
rm -rf conftest*
eval "ac_cv_lib_$ac_lib_var=yes"
else
fi
echo $ac_n "checking whether ln works""... $ac_c" 1>&6
-echo "configure:1086: checking whether ln works" >&5
+echo "configure:1085: checking whether ln works" >&5
if eval "test \"`echo '$''{'gcc_cv_prog_LN'+set}'`\" = set"; then
echo $ac_n "(cached) $ac_c" 1>&6
else
fi
echo $ac_n "checking whether ln -s works""... $ac_c" 1>&6
-echo "configure:1118: checking whether ln -s works" >&5
+echo "configure:1117: checking whether ln -s works" >&5
if eval "test \"`echo '$''{'gcc_cv_prog_LN_S'+set}'`\" = set"; then
echo $ac_n "(cached) $ac_c" 1>&6
else
# Extract the first word of "ranlib", so it can be a program name with args.
set dummy ranlib; ac_word=$2
echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:1152: checking for $ac_word" >&5
+echo "configure:1151: checking for $ac_word" >&5
if eval "test \"`echo '$''{'ac_cv_prog_RANLIB'+set}'`\" = set"; then
echo $ac_n "(cached) $ac_c" 1>&6
else
# Extract the first word of "$ac_prog", so it can be a program name with args.
set dummy $ac_prog; ac_word=$2
echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:1183: checking for $ac_word" >&5
+echo "configure:1182: checking for $ac_word" >&5
if eval "test \"`echo '$''{'ac_cv_prog_YACC'+set}'`\" = set"; then
echo $ac_n "(cached) $ac_c" 1>&6
else
# SVR4 /usr/ucb/install, which tries to use the nonexistent group "staff"
# ./install, which can be erroneously created by make from ./install.sh.
echo $ac_n "checking for a BSD compatible install""... $ac_c" 1>&6
-echo "configure:1223: checking for a BSD compatible install" >&5
+echo "configure:1222: checking for a BSD compatible install" >&5
if test -z "$INSTALL"; then
if eval "test \"`echo '$''{'ac_cv_path_install'+set}'`\" = set"; then
echo $ac_n "(cached) $ac_c" 1>&6
# Extract the first word of "gcc", so it can be a program name with args.
set dummy gcc; ac_word=$2
echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:1277: checking for $ac_word" >&5
+echo "configure:1276: checking for $ac_word" >&5
if eval "test \"`echo '$''{'ac_cv_prog_CC'+set}'`\" = set"; then
echo $ac_n "(cached) $ac_c" 1>&6
else
# Extract the first word of "cc", so it can be a program name with args.
set dummy cc; ac_word=$2
echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:1306: checking for $ac_word" >&5
+echo "configure:1305: checking for $ac_word" >&5
if eval "test \"`echo '$''{'ac_cv_prog_CC'+set}'`\" = set"; then
echo $ac_n "(cached) $ac_c" 1>&6
else
fi
echo $ac_n "checking whether the C compiler ($CC $CFLAGS $LDFLAGS) works""... $ac_c" 1>&6
-echo "configure:1354: checking whether the C compiler ($CC $CFLAGS $LDFLAGS) works" >&5
+echo "configure:1353: checking whether the C compiler ($CC $CFLAGS $LDFLAGS) works" >&5
ac_ext=c
# CFLAGS is not in ac_cpp because -g, -O, etc. are not valid cpp options.
cross_compiling=$ac_cv_prog_cc_cross
cat > conftest.$ac_ext <<EOF
-#line 1364 "configure"
+#line 1363 "configure"
#include "confdefs.h"
main(){return(0);}
EOF
-if { (eval echo configure:1368: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
+if { (eval echo configure:1367: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
ac_cv_prog_cc_works=yes
# If we can't run a trivial program, we are probably using a cross compiler.
if (./conftest; exit) 2>/dev/null; then
{ echo "configure: error: installation or configuration problem: C compiler cannot create executables." 1>&2; exit 1; }
fi
echo $ac_n "checking whether the C compiler ($CC $CFLAGS $LDFLAGS) is a cross-compiler""... $ac_c" 1>&6
-echo "configure:1388: checking whether the C compiler ($CC $CFLAGS $LDFLAGS) is a cross-compiler" >&5
+echo "configure:1387: checking whether the C compiler ($CC $CFLAGS $LDFLAGS) is a cross-compiler" >&5
echo "$ac_t""$ac_cv_prog_cc_cross" 1>&6
cross_compiling=$ac_cv_prog_cc_cross
echo $ac_n "checking whether we are using GNU C""... $ac_c" 1>&6
-echo "configure:1393: checking whether we are using GNU C" >&5
+echo "configure:1392: checking whether we are using GNU C" >&5
if eval "test \"`echo '$''{'ac_cv_prog_gcc'+set}'`\" = set"; then
echo $ac_n "(cached) $ac_c" 1>&6
else
yes;
#endif
EOF
-if { ac_try='${CC-cc} -E conftest.c'; { (eval echo configure:1402: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; } | egrep yes >/dev/null 2>&1; then
+if { ac_try='${CC-cc} -E conftest.c'; { (eval echo configure:1401: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; } | egrep yes >/dev/null 2>&1; then
ac_cv_prog_gcc=yes
else
ac_cv_prog_gcc=no
ac_save_CFLAGS="$CFLAGS"
CFLAGS=
echo $ac_n "checking whether ${CC-cc} accepts -g""... $ac_c" 1>&6
-echo "configure:1417: checking whether ${CC-cc} accepts -g" >&5
+echo "configure:1416: checking whether ${CC-cc} accepts -g" >&5
if eval "test \"`echo '$''{'ac_cv_prog_cc_g'+set}'`\" = set"; then
echo $ac_n "(cached) $ac_c" 1>&6
else
fi
echo $ac_n "checking whether ${MAKE-make} sets \${MAKE}""... $ac_c" 1>&6
-echo "configure:1445: checking whether ${MAKE-make} sets \${MAKE}" >&5
+echo "configure:1444: checking whether ${MAKE-make} sets \${MAKE}" >&5
set dummy ${MAKE-make}; ac_make=`echo "$2" | sed 'y%./+-%__p_%'`
if eval "test \"`echo '$''{'ac_cv_prog_make_${ac_make}_set'+set}'`\" = set"; then
echo $ac_n "(cached) $ac_c" 1>&6
echo $ac_n "checking how to run the C preprocessor""... $ac_c" 1>&6
-echo "configure:1473: checking how to run the C preprocessor" >&5
+echo "configure:1472: checking how to run the C preprocessor" >&5
# On Suns, sometimes $CPP names a directory.
if test -n "$CPP" && test -d "$CPP"; then
CPP=
# On the NeXT, cc -E runs the code through the compiler's parser,
# not just through cpp.
cat > conftest.$ac_ext <<EOF
-#line 1488 "configure"
+#line 1487 "configure"
#include "confdefs.h"
#include <assert.h>
Syntax Error
EOF
ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:1494: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:1493: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
ac_err=`grep -v '^ *+' conftest.out`
if test -z "$ac_err"; then
:
rm -rf conftest*
CPP="${CC-cc} -E -traditional-cpp"
cat > conftest.$ac_ext <<EOF
-#line 1505 "configure"
+#line 1504 "configure"
#include "confdefs.h"
#include <assert.h>
Syntax Error
EOF
ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:1511: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:1510: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
ac_err=`grep -v '^ *+' conftest.out`
if test -z "$ac_err"; then
:
fi
echo "$ac_t""$CPP" 1>&6
-for ac_hdr in inttypes.h limits.h stddef.h string.h strings.h stdlib.h time.h unistd.h varargs.h sys/varargs.h
+for ac_hdr in limits.h stddef.h string.h strings.h stdlib.h time.h unistd.h varargs.h sys/varargs.h
do
ac_safe=`echo "$ac_hdr" | sed 'y%./+-%__p_%'`
echo $ac_n "checking for $ac_hdr""... $ac_c" 1>&6
-echo "configure:1537: checking for $ac_hdr" >&5
+echo "configure:1536: checking for $ac_hdr" >&5
if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
echo $ac_n "(cached) $ac_c" 1>&6
else
cat > conftest.$ac_ext <<EOF
-#line 1542 "configure"
+#line 1541 "configure"
#include "confdefs.h"
#include <$ac_hdr>
EOF
ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:1547: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:1546: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
ac_err=`grep -v '^ *+' conftest.out`
if test -z "$ac_err"; then
rm -rf conftest*
done
+# Use <inttypes.h> only if it exists,
+# doesn't clash with <sys/types.h>, and declares intmax_t.
+echo $ac_n "checking for inttypes.h""... $ac_c" 1>&6
+echo "configure:1576: checking for inttypes.h" >&5
+if eval "test \"`echo '$''{'gcc_cv_header_inttypes_h'+set}'`\" = set"; then
+ echo $ac_n "(cached) $ac_c" 1>&6
+else
+ cat > conftest.$ac_ext <<EOF
+#line 1581 "configure"
+#include "confdefs.h"
+#include <sys/types.h>
+#include <inttypes.h>
+int main() {
+intmax_t i = -1;
+; return 0; }
+EOF
+if { (eval echo configure:1589: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+ rm -rf conftest*
+ cat >> confdefs.h <<EOF
+#define HAVE_INTTYPES_H 1
+EOF
+
+ gcc_cv_header_inttypes_h=yes
+else
+ echo "configure: failed program was:" >&5
+ cat conftest.$ac_ext >&5
+ rm -rf conftest*
+ gcc_cv_header_inttypes_h=no
+fi
+rm -f conftest*
+fi
+
+echo "$ac_t""$gcc_cv_header_inttypes_h" 1>&6
+
echo $ac_n "checking whether malloc must be declared""... $ac_c" 1>&6
-echo "configure:1575: checking whether malloc must be declared" >&5
+echo "configure:1608: checking whether malloc must be declared" >&5
if eval "test \"`echo '$''{'gcc_cv_decl_needed_malloc'+set}'`\" = set"; then
echo $ac_n "(cached) $ac_c" 1>&6
else
cat > conftest.$ac_ext <<EOF
-#line 1580 "configure"
+#line 1613 "configure"
#include "confdefs.h"
#include <stdio.h>
char *(*pfn) = (char *(*)) malloc
; return 0; }
EOF
-if { (eval echo configure:1601: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:1634: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
rm -rf conftest*
gcc_cv_decl_needed_malloc=no
else
fi
echo $ac_n "checking whether realloc must be declared""... $ac_c" 1>&6
-echo "configure:1623: checking whether realloc must be declared" >&5
+echo "configure:1656: checking whether realloc must be declared" >&5
if eval "test \"`echo '$''{'gcc_cv_decl_needed_realloc'+set}'`\" = set"; then
echo $ac_n "(cached) $ac_c" 1>&6
else
cat > conftest.$ac_ext <<EOF
-#line 1628 "configure"
+#line 1661 "configure"
#include "confdefs.h"
#include <stdio.h>
char *(*pfn) = (char *(*)) realloc
; return 0; }
EOF
-if { (eval echo configure:1649: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:1682: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
rm -rf conftest*
gcc_cv_decl_needed_realloc=no
else
fi
echo $ac_n "checking whether calloc must be declared""... $ac_c" 1>&6
-echo "configure:1671: checking whether calloc must be declared" >&5
+echo "configure:1704: checking whether calloc must be declared" >&5
if eval "test \"`echo '$''{'gcc_cv_decl_needed_calloc'+set}'`\" = set"; then
echo $ac_n "(cached) $ac_c" 1>&6
else
cat > conftest.$ac_ext <<EOF
-#line 1676 "configure"
+#line 1709 "configure"
#include "confdefs.h"
#include <stdio.h>
char *(*pfn) = (char *(*)) calloc
; return 0; }
EOF
-if { (eval echo configure:1697: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:1730: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
rm -rf conftest*
gcc_cv_decl_needed_calloc=no
else
fi
echo $ac_n "checking whether free must be declared""... $ac_c" 1>&6
-echo "configure:1719: checking whether free must be declared" >&5
+echo "configure:1752: checking whether free must be declared" >&5
if eval "test \"`echo '$''{'gcc_cv_decl_needed_free'+set}'`\" = set"; then
echo $ac_n "(cached) $ac_c" 1>&6
else
cat > conftest.$ac_ext <<EOF
-#line 1724 "configure"
+#line 1757 "configure"
#include "confdefs.h"
#include <stdio.h>
char *(*pfn) = (char *(*)) free
; return 0; }
EOF
-if { (eval echo configure:1745: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:1778: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
rm -rf conftest*
gcc_cv_decl_needed_free=no
else
echo $ac_n "checking for sys_siglist declaration in signal.h or unistd.h""... $ac_c" 1>&6
-echo "configure:1768: checking for sys_siglist declaration in signal.h or unistd.h" >&5
+echo "configure:1801: checking for sys_siglist declaration in signal.h or unistd.h" >&5
if eval "test \"`echo '$''{'ac_cv_decl_sys_siglist'+set}'`\" = set"; then
echo $ac_n "(cached) $ac_c" 1>&6
else
cat > conftest.$ac_ext <<EOF
-#line 1773 "configure"
+#line 1806 "configure"
#include "confdefs.h"
#include <sys/types.h>
#include <signal.h>
char *msg = *(sys_siglist + 1);
; return 0; }
EOF
-if { (eval echo configure:1785: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:1818: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
rm -rf conftest*
ac_cv_decl_sys_siglist=yes
else
for ac_func in strerror strtoul bsearch
do
echo $ac_n "checking for $ac_func""... $ac_c" 1>&6
-echo "configure:1809: checking for $ac_func" >&5
+echo "configure:1842: checking for $ac_func" >&5
if eval "test \"`echo '$''{'ac_cv_func_$ac_func'+set}'`\" = set"; then
echo $ac_n "(cached) $ac_c" 1>&6
else
cat > conftest.$ac_ext <<EOF
-#line 1814 "configure"
+#line 1847 "configure"
#include "confdefs.h"
/* System header to define __stub macros and hopefully few prototypes,
which can conflict with char $ac_func(); below. */
; return 0; }
EOF
-if { (eval echo configure:1837: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
+if { (eval echo configure:1870: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
rm -rf conftest*
eval "ac_cv_func_$ac_func=yes"
else
# Ultrix sh set writes to stderr and can't be redirected directly,
# and sets the high bit in the cache file unless we assign to the vars.
(set) 2>&1 |
- case `(ac_space=' '; set) 2>&1 | grep ac_space` in
+ case `(ac_space=' '; set) 2>&1` in
*ac_space=\ *)
# `set' does not quote correctly, so add quotes (double-quote substitution
# turns \\\\ into \\, and sed turns \\ into \).
s/@@/%@/; s/@@/@%/; s/@g\$/%g/' > conftest.subs <<\\CEOF
$ac_vpsub
$extrasub
-s%@SHELL@%$SHELL%g
s%@CFLAGS@%$CFLAGS%g
s%@CPPFLAGS@%$CPPFLAGS%g
s%@CXXFLAGS@%$CXXFLAGS%g