From 88ecdb2637f7de4b90d11a5df09be7fda3bf2b7d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?IOhannes=20m=20zm=C3=B6lnig?=
 <zmoelnig@users.sourceforge.net>
Date: Thu, 15 Sep 2005 12:02:54 +0000
Subject: automatic dependency generation on-the-fly sources generation
 (iemmatrix.c mtx_*.c)

svn path=/trunk/externals/iem/iemmatrix/; revision=3563
---
 src/Makefile.in  | 30 +++++++++++++++++++++---------
 src/configure.ac |  8 ++++++++
 2 files changed, 29 insertions(+), 9 deletions(-)

(limited to 'src')

diff --git a/src/Makefile.in b/src/Makefile.in
index fd138d3..290efb9 100644
--- a/src/Makefile.in
+++ b/src/Makefile.in
@@ -8,6 +8,7 @@ INSTALL_DOC=$(PREFIX)/@REFERENCEPATH@$(LIBNAME)
 EXT = @EXT@ 
 DEFS = @DFLAGS@
 IFLAGS = -I. @INCLUDES@ $(INCLUDES)
+MAKEDEP_FLAGS = @MAKEDEP_FLAGS@
 
 CC = @CC@
 LD = @LD@
@@ -24,27 +25,37 @@ TARNAME =  $(LIBNAME)-@IEMMATRIX_VERSION@.tgz
 CFLAGS = $(DEFS) $(IFLAGS) $(WFLAGS) @CFLAGS@ 
 
 LIBS = @LIBS@
-include Make.source
-TARGETS = $(SOURCES:.c=.o)
 
+SOURCES=$(sort $(filter %.c, $(wildcard mtx_*.c))) iemmatrix.c
+TARGETS = $(SOURCES:.c=.o) 
 
 all: $(LIBNAME)
+	echo targets $(TARGETS)
 	cp $(LIBNAME).$(EXT) ..
 
 $(LIBNAME): $(TARGETS)
 	$(LD) $(LFLAGS) -o $(LIBNAME).$(EXT) *.o $(LIBS)
 	$(STRIP) @STRIPFLAGS@ $(LIBNAME).$(EXT)
 
+## dependencies: as proposed by the GNU-make documentation
+## see http://www.gnu.org/software/make/manual/html_node/make_47.html#SEC51
+-include $(SOURCES:.c=.d)
+%.d: %.c
+	@set -e; rm -f $@; \
+	$(CXX) $(MAKEDEP_FLAGS) $(CFLAGS) $< > $@.$$$$; \
+	sed 's,\($*\)\.o[ :]*,\1.o $@ : ,g' < $@.$$$$ > $@; \
+	rm -f $@.$$$$
+
 clean:
 	-rm -f *.$(EXT) *.o 
 
 cleaner: clean
-	-rm -f *~ _* config.*
+	-rm -f *~ _* config.* *.d *.d.*
 
 cleanest: cleaner
-	-rm -f Makefile ../*.$(EXT) Make.source
+	-rm -f Makefile ../*.$(EXT) 
 
-distclean: cleanest newmakefile
+distclean: cleanest
 
 install: install-bin install-doc
 
@@ -65,7 +76,8 @@ newmakefile:
 	echo "current:">Makefile
 	echo "	./configure && make">>Makefile
 
-source:
-	echo "SOURCES = \\"> Make.source
-	echo `ls mtx_*.c $(LIBNAME).c` >> Make.source
-	echo >> Make.source
+Makefile: Makefile.in configure
+	./configure
+
+configure: configure.ac
+	autoconf
diff --git a/src/configure.ac b/src/configure.ac
index 97ce924..0cc015b 100644
--- a/src/configure.ac
+++ b/src/configure.ac
@@ -64,6 +64,14 @@ dnl Checks for library functions.
 AC_FUNC_MMAP
 AC_CHECK_FUNCS(select socket strerror)
 
+
+### make-depend flags
+if test "x$ac_cv_c_compiler_gnu" = "xyes"; then
+ AC_SUBST(MAKEDEP_FLAGS, "-MM")
+else
+ AC_SUBST(MAKEDEP_FLAGS, "-M")
+fi
+
 dnl check for "-mms-bitfields" cflag
 dnl why is there no generic compiler-check for a given flag ?
 dnl it would make things so easy: AC_CHECK_FLAG([-mms-bitfields],,)
-- 
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