Makefile: Support out-of-tree builds.

[preload-hacks] / Makefile

diff --git a/Makefile b/Makefile
index 519270e..b77af1d 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -23,9 +23,11 @@
 ### with preload-hacks; if not, write to the Free Software Foundation, Inc.,
 ### 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 
+srcdir                  = .
 PACKAGE                         = preload-hacks
-VERSION                        := $(shell ./auto-version)
+VERSION                        := $(shell cd $(srcdir) && ./auto-version)
 
+VPATH                   = $(srcdir)
 .SECONDEXPANSION: #sorry
 
 ###--------------------------------------------------------------------------
@@ -44,24 +46,6 @@ man1dir                       = ${mandir}/man1
 DESTDIR                         =
 
 ###--------------------------------------------------------------------------
-### Quiet building.
-
-## Verbosity.
-V                       = 0
-
-## Compilation.
-V_CC                    = $(V_CC_$(V))$(CC)
-V_CC_0                  = @echo "  CC     $@";
-
-## Linking.
-V_LD                    = $(V_LD_$(V))$(LD)
-V_LD_0                  = @echo "  LD     $@";
-
-## Generation.
-V_GEN                   = $(V_GEN_$(V))
-V_GEN_0                         = @echo "  GEN    $@";
-
-###--------------------------------------------------------------------------
 ### Build parameters.
 
 ## Mess with these if you like.
@@ -78,9 +62,22 @@ INST_BIN              = $(INSTALL) -c -m755
 MKDIRS                  = $(INSTALL) -d -m755
 
 ## Probably best if you leave these alone.
-REAL_CFLAGS             = $(CFLAGS) -fPIC
+REAL_CFLAGS             = $(CFLAGS) -fPIC -MD
 REAL_LDFLAGS            = $(LDFLAGS) -shared
 
+## Allow user overrides for this stuff.
+-include config.mk
+
+###--------------------------------------------------------------------------
+### Quiet building.
+
+## Verbosity.
+V                       = 0
+v_tag                   = $(call v_tag_$V,$1)
+v_tag_0                         = @printf "  %-8s %s\n" "$1" "$@";
+V_AT                    = $(V_AT_$V)
+V_AT_0                  = @
+
 ###--------------------------------------------------------------------------
 ### Main targets.
 
@@ -138,28 +135,30 @@ DISTFILES         += $(patsubst %, debian/%.lintian-overrides, \
 ###--------------------------------------------------------------------------
 ### Building.
 
-all: $(TARGETS)
+all:: $(TARGETS)
 .PHONY: ALL
 
 CLEAN                  += $(TARGETS)
-CLEAN                  += *.o
-clean:
+CLEAN                  += *.o *.d
+clean::
        rm -f $(CLEAN)
 .PHONY: clean
 
 ## Building sources.
 %.o: %.c
-       $(V_CC) -c $(REAL_CFLAGS) $< -o $@
+       $(call v_tag,CC)$(CC) -c $(REAL_CFLAGS) $< -o $@
 
 ## Constructing preload hacks.
 $(addsuffix .so,$(HACKS)): %.so: $$(patsubst %.c,%.o,$$($$*_SOURCES))
-       $(V_LD) $(REAL_LDFLAGS) $< $(LDLIBS) -o $@
+       $(call v_tag,LD)$(LD) $(REAL_LDFLAGS) $< $(LDLIBS) -o $@
 
 ## Constructing the scripts.
 $(SCRIPTS): %: withlib.in
-       $(V_GEN)sed "s/@lib@/$@/" withlib.in >$@.new && \
+       $(call v_tag,GEN)sed "s/@lib@/$@/" $(srcdir)/withlib.in >$@.new && \
                chmod +x $@.new && mv $@.new $@
 
+-include $(patsubst %.c,%d,$(ALL_SOURCES))
+
 ###--------------------------------------------------------------------------
 ### Installation.
 
@@ -169,7 +168,7 @@ install: all
        $(MKDIRS) $(DESTDIR)$(libdir)
        $(INST_BIN) $(LIBS) $(DESTDIR)$(libdir)
        $(MKDIRS) $(DESTDIR)$(man1dir)
-       $(INST_MAN) $(MAN1) $(DESTDIR)$(man1dir)
+       $(INST_MAN) $(addprefix $(srcdir)/,$(MAN1)) $(DESTDIR)$(man1dir)
 .PHONY: install
 
 uninstall:
@@ -191,7 +190,7 @@ distdir:
              d=$${i%/*} && $(MKDIRS) $(distdir)/$$d || exit 1 \
              ;; \
          esac; \
-         ln $$i $(distdir)/$$i || exit 1; \
+         cp $(srcdir)/$$i $(distdir)/$$i || exit 1; \
        done
 .PHONY: distdir
 
@@ -203,12 +202,13 @@ dist: distdir
 distcheck: dist
        rm -rf _distcheck
        mkdir _distcheck
-       cd _distcheck && \
+       +cd _distcheck && \
        tar xvfz ../$(DISTTAR) && \
-       cd $(distdir) && \
-       make && \
-       make install DESTDIR=../_install && \
-       make dist
+       mkdir _build && cd _build && \
+       make -f../$(distdir)/Makefile srcdir=../$(distdir) && \
+       make -f../$(distdir)/Makefile srcdir=../$(distdir) \
+               install DESTDIR=../_install && \
+       make -f../$(distdir)/Makefile srcdir=../$(distdir) dist
        rm -rf _distcheck
 
 ###----- That's all, folks --------------------------------------------------