Further improvements to build system wrt detection of compiler and libc features and prototypes, as discussed with James Antill on mailin list

darcs-hash:20060329002500-ac50b-e7618e476ea69802bd2cb0076244f49a0f178df7.gz

1 files changed, 73 insertions, 28 deletions

diff --git a/configure.ac b/configure.ac
index 22509e33..813d2f20 100644
--- a/configure.ac
+++ b/configure.ac
@@ -10,12 +10,12 @@ if test configure -ot configure.ac; then
 		# shell and autconf should take care of that themselves
 		AC_MSG_NOTICE([running autoconf])
 		if autoconf; then
-			./configure $@
+			./configure "$@"
 		fi
 		exit			
 	else
 		AC_MSG_ERROR( [cannot find the autoconf program in your path.
-This program is needs to be run whenever the configure.ac file is modified.
+This program needs to be run whenever the configure.ac file is modified.
 Please install it and try again.])
 	fi
 else
@@ -32,7 +32,7 @@ if test ! -f ./config.h.in -o config.h.in -ot configure.ac; then
 		autoheader
 	else
 		AC_MSG_ERROR( [cannot find the autoheader program in your path.
-This program is needs to be run whenever the configure.ac file is modified.
+This program needs to be run whenever the configure.ac file is modified.
 Please install it and try again.])
 	fi
 else
@@ -113,21 +113,36 @@ else
 fi
 
 #
+# Test if the compiler accepts the -std=c99 flag. If so, that
+# increases the odds of correct compilation, since we want to use the
+# *wprintf functions, which where defined in C99.
+#
+
+XCFLAGS="$CFLAGS"
+CFLAGS="$CFLAGS -std=c99"
+AC_MSG_CHECKING(if -std=c99 works)
+AC_CACHE_VAL(local_cv_has__std_c99,[
+AC_TRY_RUN([
+#include <stdlib.h>
+#include <stdio.h>
+
+int main() {
+return 0;
+}],
+local_cv_has__std_c99=yes,
+local_cv_has__std_c99=no,
+)])
+AC_MSG_RESULT($local_cv_has__std_c99)
+case x$local_cv_has__std_c99 in
+xno) CFLAGS="$XCFLAGS" ;;
+esac
+
+#
 # If we are using gcc, set some flags that increase the odds of the
 # compiler producing a working binary...
 #
 
 if test "$CC" = gcc; then
-   
-	#
-	# This seems to be needed in some glibc versions in order to get
-	# the prototypes for wide character functions like wcsdup and
-	# fwprintf.  Fish should not actually use anu C99-specific
-	# features - if it does, please report this as a bug.
-	#
-
-	CFLAGS="$CFLAGS -std=c99"
-
 
 	#
 	# -fno-optimize-sibling-calls seems to work around a bug where
@@ -148,27 +163,54 @@ if test "$CC" = gcc; then
 
 	CFLAGS="$CFLAGS -Wall"
 
+fi
+
+
+# Check if we are compiling against glibc
+AC_MSG_CHECKING([if we are compiling against glibc])
+AC_RUN_IFELSE(
+	[AC_LANG_PROGRAM([
+#include <stdlib.h>
+#ifdef __GLIBC__
+#define STATUS 0
+#else
+#define STATUS 1
+#endif],
+		[return STATUS;])], 
+	[glibc=yes], 
+	[glibc=no] )
+
+if test "$glibc" = yes; then
+	AC_MSG_RESULT(yes)
+
 	#
-	# This gives us access to prototypes for gnu extensions if we are
-	# compiling agains glibc. All extensions that are used must have a
-	# fallback implementation available in fallback.h, in order to
-	# keep fish working on non-gnu platforms.
+	# This gives us access to prototypes for gnu extensions and C99
+	# functions if we are compiling agains glibc. All GNU extensions
+	# that are used must have a fallback implementation available in
+	# fallback.h, in order to keep fish working on non-gnu platforms.
 	#
 
-	CFLAGS="$CFLAGS -D _GNU_SOURCE"
-	
-fi
+	CFLAGS="$CFLAGS -D _GNU_SOURCE -D _ISOC99_SOURCE"
 
+else
+	AC_MSG_RESULT(no)
+fi
 
 # Test cpu for special handling of ppc
+#
+# This is used to skip use of tputs on ppc systems, since it seemed to
+# be broken, at least on older debin-based systems. This is obviously
+# not the right way to to detect whether this workaround should be
+# used, since it catches far to many systems, but I do not have the
+# hardware available to narrow this problem down, and in practice, it
+# seems that tputs is never really needed.
+#
 AC_CANONICAL_TARGET
 
 if test $target_cpu = powerpc; then
    AC_DEFINE([TPUTS_KLUDGE],[1],[Evil kludge to get Power based machines to work])
 fi
 
-AC_DEFINE_UNQUOTED([CPU],[L"$target_cpu"],[CPU type])
-
 
 # Set up PREFIX and related preprocessor symbols. Fish needs to know
 # where it will be installed. One of the reasons for this is so that
@@ -208,6 +250,12 @@ AC_SUBST( [LOCALEDIR], [$datadir/locale])
 # information about running processes.
 AC_CHECK_FILES([/proc/self/stat])
 
+# This is ued to tell the wgetopt library to translate strings. This
+# way wgetopt can be dropped into any project without requiring i18n.
+
+AC_DEFINE([HAVE_TRANSLATE_H], [1],
+			  [Define to 1 if the wgettext function should be used for translating strings.])
+
 # Check for presense of various libraries
 AC_SEARCH_LIBS( gettext, intl, AC_SUBST( HAVE_GETTEXT, [1] ), AC_SUBST( HAVE_GETTEXT, [0] ) )
 AC_SEARCH_LIBS( connect, socket, , [AC_MSG_ERROR([Cannot find the socket library, needed to build this package.] )] )
@@ -248,9 +296,10 @@ else
 	AC_MSG_RESULT(no)
 fi
 
+# If we have a fwprintf in libc, test that it actually works. As of
+# March 2006, it is broken under Dragonfly BSD.
 if test "$ac_cv_func_fwprintf" = yes; then
 
-	# Check if fwprintf is broken
 	AC_MSG_CHECKING([if fwprintf is broken])
 	AC_RUN_IFELSE(
 		[AC_LANG_PROGRAM([
@@ -321,9 +370,6 @@ else
     AC_MSG_RESULT(no)
 fi
 
-AC_DEFINE([HAVE_TRANSLATE_H], [1],
-			  [Define to 1 if the wgettext function should be used for translating strings.])
-
 # Check for _nl_msg_cat_cntr symbol
 AC_MSG_CHECKING([for _nl_msg_cat_cntr symbol])
 AC_TRY_LINK([#if HAVE_LIBINTL_H]
@@ -344,5 +390,4 @@ AC_CONFIG_FILES([Makefile fish.spec doc_src/fish.1 doc_src/Doxyfile etc/fish etc
 AC_OUTPUT
 
 echo "fish is now configured."
-echo "Now run 'make' and 'make install' to built and install fish."
-echo "Good luck!"
+echo "Use 'make' and 'make install' to built and install fish."