autoconf-2.13-make-defs-62361

[platform/upstream/autoconf213.git] / acgeneral.m4

diff --git a/acgeneral.m4 b/acgeneral.m4
index d00872f..38f2601 100644 (file)
--- a/acgeneral.m4
+++ b/acgeneral.m4
@@ -2156,20 +2156,38 @@ dnl It is called inside configure, outside of config.status.
 dnl AC_OUTPUT_MAKE_DEFS()
 define(AC_OUTPUT_MAKE_DEFS,
 [# Transform confdefs.h into DEFS.
-dnl Using a here document instead of a string reduces the quoting nightmare.
 # Protect against shell expansion while executing Makefile rules.
 # Protect against Makefile macro expansion.
-cat > conftest.defs <<\EOF
+#
+# If the first sed substitution is executed (which looks for macros that
+# take arguments), then we branch to the quote section.  Otherwise,
+# look for a macro that doesn't take arguments.
+cat >confdef2opt.sed <<\_ACEOF
 changequote(<<, >>)dnl
-s%<<#define>> \([A-Za-z_][A-Za-z0-9_]*\) *\(.*\)%-D\1=\2%g
-s%[    `~<<#>>$^&*(){}\\|;'"<>?]%\\&%g
-s%\[%\\&%g
-s%\]%\\&%g
-s%\$%$$%g
+t clear
+: clear
+s,^[   ]*#[    ]*define[       ][      ]*\([^  (][^    (]*([^)]*)\)[   ]*\(.*\),-D\1=\2,g
+t quote
+s,^[   ]*#[    ]*define[       ][      ]*\([^  ][^     ]*\)[   ]*\(.*\),-D\1=\2,g
+t quote
+d
+: quote
+s,[    `~#$^&*(){}\\|;'"<>?],\\&,g
+s,\[,\\&,g
+s,\],\\&,g
+s,\$,$$,g
+p
 changequote([, ])dnl
-EOF
-DEFS=`sed -f conftest.defs confdefs.h | tr '\012' ' '`
-rm -f conftest.defs
+_ACEOF
+# We use echo to avoid assuming a particular line-breaking character.
+# The extra dot is to prevent the shell from consuming trailing
+# line-breaks from the sub-command output.  A line-break within
+# single-quotes doesn't work because, if this script is created in a
+# platform that uses two characters for line-breaks (e.g., DOS), tr
+# would break.
+ac_LF_and_DOT=`echo; echo .`
+DEFS=`sed -n -f confdef2opt.sed confdefs.h | tr "$ac_LF_and_DOT" ' .'`
+rm -f confdef2opt.sed
 ])
 
 dnl Do the variable substitutions to create the Makefiles or whatever.