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Use AC_EGREP_CPP to check if the C preprocessor

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converts `..' to `. .'.  If it converts, set CPP_NEED_TRADITIONAL
to `yes'.  Later in AC_OUTPUT, check this variable.
This commit is contained in:
Gerd Moellmann 2001-02-23 13:31:40 +00:00
parent c400241bbe
commit 3aa40e0e02
1 changed files with 12 additions and 2 deletions
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14
configure.in
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@ -2232,6 +2232,16 @@ test "${exec_prefix}" != NONE &&
exec_prefix=`echo "${exec_prefix}" | sed 's,\([^/]\)/*$,\1,'`
changequote([, ])dnl
## Check if the C preprocessor will convert `..' to `. .'. If so, set
## CPP_NEED_TRADITIONAL to `yes' so that the code to generate Makefile
## from Makefile.c can correctly provide the arg `-traditional' to the
## C preprocessor.
AC_EGREP_CPP(yes..yes,
[yes..yes],
CPP_NEED_TRADITIONAL=no,
CPP_NEED_TRADITIONAL=yes)
AC_OUTPUT(Makefile lib-src/Makefile.c:lib-src/Makefile.in oldXMenu/Makefile \
man/Makefile lwlib/Makefile src/Makefile.c:src/Makefile.in \
lisp/Makefile leim/Makefile, [
@ -2264,7 +2274,7 @@ make epaths-force
# As of 2000-11-19, newest development versions of GNU cpp preprocess
# `..' to `. .' unless invoked with -traditional
if test "x$GCC" = xyes && test "x$NON_GNU_CPP" = x; then
if test "x$GCC" = xyes && test "x$CPP_NEED_TRADITIONAL" = xyes; then
CPPFLAGS="$CPPFLAGS -traditional"
fi
@ -2308,5 +2318,5 @@ fi
# This is how we know whether to re-run configure in certain cases.
touch src/config.stamp
], [GCC="$GCC" NON_GNU_CPP="$NON_GNU_CPP" CPP="$CPP" CPPFLAGS="$CPPFLAGS"])
], [GCC="$GCC" NON_GNU_CPP="$NON_GNU_CPP" CPP="$CPP" CPP_NEED_TRADITIONAL="$CPP_NEED_TRADITIONAL" CPPFLAGS="$CPPFLAGS"])