Allow building zlib outside of the source directory.

To build, simply run configure from the source directory by
specifying its path.  That path will be used to find the source
files.  The source directory will not be touched.  All new and
modified files will be made in the current directory.  Discovered
in the process that not all makes understand % or $<, and not all
compilers understand -include or -I-.  This required a larger
Makefile.in with explicit dependencies.

1 files changed, 169 insertions, 52 deletions

diff --git a/Makefile.in b/Makefile.in
index f608c6c..7408644 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -53,6 +53,9 @@ includedir = ${prefix}/include
 mandir = ${prefix}/share/man
 man3dir = ${mandir}/man3
 pkgconfigdir = ${libdir}/pkgconfig
+SRCDIR=
+ZINC=
+ZINCOUT=-I.
 
 OBJZ = adler32.o crc32.o deflate.o infback.o inffast.o inflate.o inftrees.o trees.o zutil.o
 OBJG = compress.o uncompr.o gzclose.o gzlib.o gzread.o gzwrite.o
@@ -113,8 +116,8 @@ test64: all64
         fi; \
         rm -f $$TMP64
 
-infcover.o: test/infcover.c zlib.h zconf.h
-        $(CC) $(CFLAGS) -I. -c -o $@ test/infcover.c
+infcover.o: $(SRCDIR)test/infcover.c $(SRCDIR)zlib.h zconf.h
+        $(CC) $(CFLAGS) $(ZINCOUT) -c -o $@ $(SRCDIR)test/infcover.c
 
 infcover: infcover.o libz.a
         $(CC) $(CFLAGS) -o $@ infcover.o libz.a
@@ -140,24 +143,140 @@ match.lo: match.S
         mv _match.o match.lo
         rm -f _match.s
 
-example.o: test/example.c zlib.h zconf.h
-        $(CC) $(CFLAGS) -I. -c -o $@ test/example.c
+example.o: $(SRCDIR)test/example.c $(SRCDIR)zlib.h zconf.h
+        $(CC) $(CFLAGS) $(ZINCOUT) -c -o $@ $(SRCDIR)test/example.c
 
-minigzip.o: test/minigzip.c zlib.h zconf.h
-        $(CC) $(CFLAGS) -I. -c -o $@ test/minigzip.c
+minigzip.o: $(SRCDIR)test/minigzip.c $(SRCDIR)zlib.h zconf.h
+        $(CC) $(CFLAGS) $(ZINCOUT) -c -o $@ $(SRCDIR)test/minigzip.c
 
-example64.o: test/example.c zlib.h zconf.h
-        $(CC) $(CFLAGS) -I. -D_FILE_OFFSET_BITS=64 -c -o $@ test/example.c
+example64.o: $(SRCDIR)test/example.c $(SRCDIR)zlib.h zconf.h
+        $(CC) $(CFLAGS) $(ZINCOUT) -D_FILE_OFFSET_BITS=64 -c -o $@ $(SRCDIR)test/example.c
 
-minigzip64.o: test/minigzip.c zlib.h zconf.h
-        $(CC) $(CFLAGS) -I. -D_FILE_OFFSET_BITS=64 -c -o $@ test/minigzip.c
+minigzip64.o: $(SRCDIR)test/minigzip.c $(SRCDIR)zlib.h zconf.h
+        $(CC) $(CFLAGS) $(ZINCOUT) -D_FILE_OFFSET_BITS=64 -c -o $@ $(SRCDIR)test/minigzip.c
 
-.SUFFIXES: .lo
 
-.c.lo:
+adler32.o: $(SRCDIR)adler32.c
+        $(CC) $(CFLAGS) $(ZINC) -c -o $@ $(SRCDIR)adler32.c
+
+crc32.o: $(SRCDIR)crc32.c
+        $(CC) $(CFLAGS) $(ZINC) -c -o $@ $(SRCDIR)crc32.c
+
+deflate.o: $(SRCDIR)deflate.c
+        $(CC) $(CFLAGS) $(ZINC) -c -o $@ $(SRCDIR)deflate.c
+
+infback.o: $(SRCDIR)infback.c
+        $(CC) $(CFLAGS) $(ZINC) -c -o $@ $(SRCDIR)infback.c
+
+inffast.o: $(SRCDIR)inffast.c
+        $(CC) $(CFLAGS) $(ZINC) -c -o $@ $(SRCDIR)inffast.c
+
+inflate.o: $(SRCDIR)inflate.c
+        $(CC) $(CFLAGS) $(ZINC) -c -o $@ $(SRCDIR)inflate.c
+
+inftrees.o: $(SRCDIR)inftrees.c
+        $(CC) $(CFLAGS) $(ZINC) -c -o $@ $(SRCDIR)inftrees.c
+
+trees.o: $(SRCDIR)trees.c
+        $(CC) $(CFLAGS) $(ZINC) -c -o $@ $(SRCDIR)trees.c
+
+zutil.o: $(SRCDIR)zutil.c
+        $(CC) $(CFLAGS) $(ZINC) -c -o $@ $(SRCDIR)zutil.c
+
+compress.o: $(SRCDIR)compress.c
+        $(CC) $(CFLAGS) $(ZINC) -c -o $@ $(SRCDIR)compress.c
+
+uncompr.o: $(SRCDIR)uncompr.c
+        $(CC) $(CFLAGS) $(ZINC) -c -o $@ $(SRCDIR)uncompr.c
+
+gzclose.o: $(SRCDIR)gzclose.c
+        $(CC) $(CFLAGS) $(ZINC) -c -o $@ $(SRCDIR)gzclose.c
+
+gzlib.o: $(SRCDIR)gzlib.c
+        $(CC) $(CFLAGS) $(ZINC) -c -o $@ $(SRCDIR)gzlib.c
+
+gzread.o: $(SRCDIR)gzread.c
+        $(CC) $(CFLAGS) $(ZINC) -c -o $@ $(SRCDIR)gzread.c
+
+gzwrite.o: $(SRCDIR)gzwrite.c
+        $(CC) $(CFLAGS) $(ZINC) -c -o $@ $(SRCDIR)gzwrite.c
+
+
+adler32.lo: $(SRCDIR)adler32.c
+        -@mkdir objs 2>/dev/null || test -d objs
+        $(CC) $(SFLAGS) $(ZINC) -DPIC -c -o objs/adler32.o $(SRCDIR)adler32.c
+        -@mv objs/adler32.o $@
+
+crc32.lo: $(SRCDIR)crc32.c
         -@mkdir objs 2>/dev/null || test -d objs
-        $(CC) $(SFLAGS) -DPIC -c -o objs/$*.o $<
-        -@mv objs/$*.o $@
+        $(CC) $(SFLAGS) $(ZINC) -DPIC -c -o objs/crc32.o $(SRCDIR)crc32.c
+        -@mv objs/crc32.o $@
+
+deflate.lo: $(SRCDIR)deflate.c
+        -@mkdir objs 2>/dev/null || test -d objs
+        $(CC) $(SFLAGS) $(ZINC) -DPIC -c -o objs/deflate.o $(SRCDIR)deflate.c
+        -@mv objs/deflate.o $@
+
+infback.lo: $(SRCDIR)infback.c
+        -@mkdir objs 2>/dev/null || test -d objs
+        $(CC) $(SFLAGS) $(ZINC) -DPIC -c -o objs/infback.o $(SRCDIR)infback.c
+        -@mv objs/infback.o $@
+
+inffast.lo: $(SRCDIR)inffast.c
+        -@mkdir objs 2>/dev/null || test -d objs
+        $(CC) $(SFLAGS) $(ZINC) -DPIC -c -o objs/inffast.o $(SRCDIR)inffast.c
+        -@mv objs/inffast.o $@
+
+inflate.lo: $(SRCDIR)inflate.c
+        -@mkdir objs 2>/dev/null || test -d objs
+        $(CC) $(SFLAGS) $(ZINC) -DPIC -c -o objs/inflate.o $(SRCDIR)inflate.c
+        -@mv objs/inflate.o $@
+
+inftrees.lo: $(SRCDIR)inftrees.c
+        -@mkdir objs 2>/dev/null || test -d objs
+        $(CC) $(SFLAGS) $(ZINC) -DPIC -c -o objs/inftrees.o $(SRCDIR)inftrees.c
+        -@mv objs/inftrees.o $@
+
+trees.lo: $(SRCDIR)trees.c
+        -@mkdir objs 2>/dev/null || test -d objs
+        $(CC) $(SFLAGS) $(ZINC) -DPIC -c -o objs/trees.o $(SRCDIR)trees.c
+        -@mv objs/trees.o $@
+
+zutil.lo: $(SRCDIR)zutil.c
+        -@mkdir objs 2>/dev/null || test -d objs
+        $(CC) $(SFLAGS) $(ZINC) -DPIC -c -o objs/zutil.o $(SRCDIR)zutil.c
+        -@mv objs/zutil.o $@
+
+compress.lo: $(SRCDIR)compress.c
+        -@mkdir objs 2>/dev/null || test -d objs
+        $(CC) $(SFLAGS) $(ZINC) -DPIC -c -o objs/compress.o $(SRCDIR)compress.c
+        -@mv objs/compress.o $@
+
+uncompr.lo: $(SRCDIR)uncompr.c
+        -@mkdir objs 2>/dev/null || test -d objs
+        $(CC) $(SFLAGS) $(ZINC) -DPIC -c -o objs/uncompr.o $(SRCDIR)uncompr.c
+        -@mv objs/uncompr.o $@
+
+gzclose.lo: $(SRCDIR)gzclose.c
+        -@mkdir objs 2>/dev/null || test -d objs
+        $(CC) $(SFLAGS) $(ZINC) -DPIC -c -o objs/gzclose.o $(SRCDIR)gzclose.c
+        -@mv objs/gzclose.o $@
+
+gzlib.lo: $(SRCDIR)gzlib.c
+        -@mkdir objs 2>/dev/null || test -d objs
+        $(CC) $(SFLAGS) $(ZINC) -DPIC -c -o objs/gzlib.o $(SRCDIR)gzlib.c
+        -@mv objs/gzlib.o $@
+
+gzread.lo: $(SRCDIR)gzread.c
+        -@mkdir objs 2>/dev/null || test -d objs
+        $(CC) $(SFLAGS) $(ZINC) -DPIC -c -o objs/gzread.o $(SRCDIR)gzread.c
+        -@mv objs/gzread.o $@
+
+gzwrite.lo: $(SRCDIR)gzwrite.c
+        -@mkdir objs 2>/dev/null || test -d objs
+        $(CC) $(SFLAGS) $(ZINC) -DPIC -c -o objs/gzwrite.o $(SRCDIR)gzwrite.c
+        -@mv objs/gzwrite.o $@
+
 
 placebo $(SHAREDLIBV): $(PIC_OBJS) libz.a
         $(LDSHARED) $(SFLAGS) -o $@ $(PIC_OBJS) $(LDSHAREDLIBC) $(LDFLAGS)
@@ -203,7 +322,7 @@ install-libs: $(LIBS)
           ln -s $(SHAREDLIBV) $(DESTDIR)$(sharedlibdir)/$(SHAREDLIBM); \
           ($(LDCONFIG) || true)  >/dev/null 2>&1; \
         fi
-        cp zlib.3 $(DESTDIR)$(man3dir)
+        cp $(SRCDIR)zlib.3 $(DESTDIR)$(man3dir)
         chmod 644 $(DESTDIR)$(man3dir)/zlib.3
         cp zlib.pc $(DESTDIR)$(pkgconfigdir)
         chmod 644 $(DESTDIR)$(pkgconfigdir)/zlib.pc
@@ -212,7 +331,7 @@ install-libs: $(LIBS)
 
 install: install-libs
         -@if [ ! -d $(DESTDIR)$(includedir)   ]; then mkdir -p $(DESTDIR)$(includedir); fi
-        cp zlib.h zconf.h $(DESTDIR)$(includedir)
+        cp $(SRCDIR)zlib.h zconf.h $(DESTDIR)$(includedir)
         chmod 644 $(DESTDIR)$(includedir)/zlib.h $(DESTDIR)$(includedir)/zconf.h
 
 uninstall:
@@ -226,18 +345,18 @@ uninstall:
 
 docs: zlib.3.pdf
 
-zlib.3.pdf: zlib.3
-        groff -mandoc -f H -T ps zlib.3 | ps2pdf - zlib.3.pdf
+zlib.3.pdf: $(SRCDIR)zlib.3
+        groff -mandoc -f H -T ps $(SRCDIR)zlib.3 | ps2pdf - $@
 
-zconf.h.cmakein: zconf.h.in
+zconf.h.cmakein: $(SRCDIR)zconf.h.in
         -@ TEMPFILE=zconfh_$$; \
         echo "/#define ZCONF_H/ a\\\\\n#cmakedefine Z_PREFIX\\\\\n#cmakedefine Z_HAVE_UNISTD_H\n" >> $$TEMPFILE &&\
-        sed -f $$TEMPFILE zconf.h.in > zconf.h.cmakein &&\
-        touch -r zconf.h.in zconf.h.cmakein &&\
+        sed -f $$TEMPFILE $(SRCDIR)zconf.h.in > $@ &&\
+        touch -r $(SRCDIR)zconf.h.in $@ &&\
         rm $$TEMPFILE
 
-zconf: zconf.h.in
-        cp -p zconf.h.in zconf.h
+zconf: $(SRCDIR)zconf.h.in
+        cp -p $(SRCDIR)zconf.h.in zconf.h
 
 mostlyclean: clean
 clean:
@@ -255,34 +374,32 @@ maintainer-clean: distclean
 distclean: clean zconf zconf.h.cmakein docs
         rm -f Makefile zlib.pc configure.log
         -@rm -f .DS_Store
-        -@printf 'all:\n\t-@echo "Please use ./configure first.  Thank you."\n' > Makefile
-        -@printf '\ndistclean:\n\tmake -f Makefile.in distclean\n' >> Makefile
-        -@touch -r Makefile.in Makefile
+        @if [ -f Makefile.in ]; then \
+        printf 'all:\n\t-@echo "Please use ./configure first.  Thank you."\n' > Makefile ; \
+        printf '\ndistclean:\n\tmake -f Makefile.in distclean\n' >> Makefile ; \
+        touch -r $(SRCDIR)Makefile.in Makefile ; fi
+        @if [ ! -f zconf.h.in ]; then rm -f zconf.h zconf.h.cmakein ; fi
+        @if [ ! -f zlib.3 ]; then rm -f zlib.3.pdf ; fi
 
 tags:
-        etags *.[ch]
-
-depend:
-        makedepend -- $(CFLAGS) -- *.[ch]
-
-# DO NOT DELETE THIS LINE -- make depend depends on it.
-
-adler32.o zutil.o: zutil.h zlib.h zconf.h
-gzclose.o gzlib.o gzread.o gzwrite.o: zlib.h zconf.h gzguts.h
-compress.o example.o minigzip.o uncompr.o: zlib.h zconf.h
-crc32.o: zutil.h zlib.h zconf.h crc32.h
-deflate.o: deflate.h zutil.h zlib.h zconf.h
-infback.o inflate.o: zutil.h zlib.h zconf.h inftrees.h inflate.h inffast.h inffixed.h
-inffast.o: zutil.h zlib.h zconf.h inftrees.h inflate.h inffast.h
-inftrees.o: zutil.h zlib.h zconf.h inftrees.h
-trees.o: deflate.h zutil.h zlib.h zconf.h trees.h
-
-adler32.lo zutil.lo: zutil.h zlib.h zconf.h
-gzclose.lo gzlib.lo gzread.lo gzwrite.lo: zlib.h zconf.h gzguts.h
-compress.lo example.lo minigzip.lo uncompr.lo: zlib.h zconf.h
-crc32.lo: zutil.h zlib.h zconf.h crc32.h
-deflate.lo: deflate.h zutil.h zlib.h zconf.h
-infback.lo inflate.lo: zutil.h zlib.h zconf.h inftrees.h inflate.h inffast.h inffixed.h
-inffast.lo: zutil.h zlib.h zconf.h inftrees.h inflate.h inffast.h
-inftrees.lo: zutil.h zlib.h zconf.h inftrees.h
-trees.lo: deflate.h zutil.h zlib.h zconf.h trees.h
+        etags $(SRCDIR)*.[ch]
+
+adler32.o zutil.o: $(SRCDIR)zutil.h $(SRCDIR)zlib.h zconf.h
+gzclose.o gzlib.o gzread.o gzwrite.o: $(SRCDIR)zlib.h zconf.h $(SRCDIR)gzguts.h
+compress.o example.o minigzip.o uncompr.o: $(SRCDIR)zlib.h zconf.h
+crc32.o: $(SRCDIR)zutil.h $(SRCDIR)zlib.h zconf.h $(SRCDIR)crc32.h
+deflate.o: $(SRCDIR)deflate.h $(SRCDIR)zutil.h $(SRCDIR)zlib.h zconf.h
+infback.o inflate.o: $(SRCDIR)zutil.h $(SRCDIR)zlib.h zconf.h $(SRCDIR)inftrees.h $(SRCDIR)inflate.h $(SRCDIR)inffast.h $(SRCDIR)inffixed.h
+inffast.o: $(SRCDIR)zutil.h $(SRCDIR)zlib.h zconf.h $(SRCDIR)inftrees.h $(SRCDIR)inflate.h $(SRCDIR)inffast.h
+inftrees.o: $(SRCDIR)zutil.h $(SRCDIR)zlib.h zconf.h $(SRCDIR)inftrees.h
+trees.o: $(SRCDIR)deflate.h $(SRCDIR)zutil.h $(SRCDIR)zlib.h zconf.h $(SRCDIR)trees.h
+
+adler32.lo zutil.lo: $(SRCDIR)zutil.h $(SRCDIR)zlib.h zconf.h
+gzclose.lo gzlib.lo gzread.lo gzwrite.lo: $(SRCDIR)zlib.h zconf.h $(SRCDIR)gzguts.h
+compress.lo example.lo minigzip.lo uncompr.lo: $(SRCDIR)zlib.h zconf.h
+crc32.lo: $(SRCDIR)zutil.h $(SRCDIR)zlib.h zconf.h $(SRCDIR)crc32.h
+deflate.lo: $(SRCDIR)deflate.h $(SRCDIR)zutil.h $(SRCDIR)zlib.h zconf.h
+infback.lo inflate.lo: $(SRCDIR)zutil.h $(SRCDIR)zlib.h zconf.h $(SRCDIR)inftrees.h $(SRCDIR)inflate.h $(SRCDIR)inffast.h $(SRCDIR)inffixed.h
+inffast.lo: $(SRCDIR)zutil.h $(SRCDIR)zlib.h zconf.h $(SRCDIR)inftrees.h $(SRCDIR)inflate.h $(SRCDIR)inffast.h
+inftrees.lo: $(SRCDIR)zutil.h $(SRCDIR)zlib.h zconf.h $(SRCDIR)inftrees.h
+trees.lo: $(SRCDIR)deflate.h $(SRCDIR)zutil.h $(SRCDIR)zlib.h zconf.h $(SRCDIR)trees.h