build: Combine rules for object files.

Currently we have many similar recipes for compiling object files from
.c files that need non-standard CPPFLAGS. All rules are identical
except that different additional options to the $(CC) command are
required to build the object file. These additional options are
provided through various $(foo_cppflags) variables.

This commit avoids this duplication by adding the necessary flags to
CPPFLAGS instead. This way we can use the same rule for all object
files.

diff --git a/Makefile.in b/Makefile.in
index 3e62d05fa04692c075a1027145927d0987484716..50394e9ca570e9973f2d5e50eafd09b16292ffac 100644 (file)
--- a/Makefile.in
+++ b/Makefile.in
@@ -182,64 +182,35 @@ $(hostbin_dir)/error2: error2.c | $(hostbin_dir)
 error2.h: $(hostbin_dir)/error2
        @[ -z "$(Q)" ] || echo 'ER2 $<'
        @echo "$(object_executable_matrix)" | $< > $@
-$(object_dir)/crypt.o: crypt.c | $(object_dir)
-       @[ -z "$(Q)" ] || echo 'CC $<'
-       $(Q) $(CC) -c -o $@ $(CPPFLAGS) $(DEBUG_CPPFLAGS) $(openssl_cppflags) $<
-$(object_dir)/spx_common.o: spx_common.c | $(object_dir)
-       @[ -z "$(Q)" ] || echo 'CC $<'
-       $(Q) $(CC) -c -o $@ $(CPPFLAGS) $(DEBUG_CPPFLAGS) $(speex_cppflags) $(ogg_cppflags) $<
-
-$(object_dir)/spxdec_filter.o: spxdec_filter.c | $(object_dir)
-       @[ -z "$(Q)" ] || echo 'CC $<'
-       $(Q) $(CC) -c -o $@ $(CPPFLAGS) $(DEBUG_CPPFLAGS) $(speex_cppflags) $(ogg_cppflags) $<
-
-$(object_dir)/spx_afh.o: spx_afh.c | $(object_dir)
-       @[ -z "$(Q)" ] || echo 'CC $<'
-       $(Q) $(CC) -c -o $@ $(CPPFLAGS) $(DEBUG_CPPFLAGS) $(speex_cppflags) $(ogg_cppflags) $<
-
-$(object_dir)/oggdec_filter.o: oggdec_filter.c | $(object_dir)
-       @[ -z "$(Q)" ] || echo 'CC $<'
-       $(Q) $(CC) -c -o $@ $(CPPFLAGS) $(DEBUG_CPPFLAGS) $(ogg_cppflags) $<
-
-$(object_dir)/ogg_afh.o: ogg_afh.c | $(object_dir)
-       @[ -z "$(Q)" ] || echo 'CC $<'
-       $(Q) $(CC) -c -o $@ $(CPPFLAGS) $(DEBUG_CPPFLAGS) $(ogg_cppflags) $<
-
-$(object_dir)/ogg_afh_common.o: ogg_afh_common.c | $(object_dir)
-       @[ -z "$(Q)" ] || echo 'CC $<'
-       $(Q) $(CC) -c -o $@ $(CPPFLAGS) $(DEBUG_CPPFLAGS) $(ogg_cppflags) $<
-
-$(object_dir)/mp3dec_filter.o: mp3dec_filter.c | $(object_dir)
-       @[ -z "$(Q)" ] || echo 'CC $<'
-       $(Q) $(CC) -c -o $@ $(CPPFLAGS) $(DEBUG_CPPFLAGS) $(mad_cppflags) $<
-
-$(object_dir)/compress_filter.o: compress_filter.c | $(object_dir)
-       @[ -z "$(Q)" ] || echo 'CC $<'
-       $(Q) $(CC) -c -o $@ $(CPPFLAGS) $(DEBUG_CPPFLAGS) -O3 $<
-
-$(object_dir)/aacdec_filter.o: aacdec_filter.c | $(object_dir)
-       @[ -z "$(Q)" ] || echo 'CC $<'
-       $(Q) $(CC) -c -o $@ $(CPPFLAGS) $(DEBUG_CPPFLAGS) $(faad_cppflags) $<
-
-$(object_dir)/aac_common.o: aac_common.c | $(object_dir)
-       @[ -z "$(Q)" ] || echo 'CC $<'
-       $(Q) $(CC) -c -o $@ $(CPPFLAGS) $(DEBUG_CPPFLAGS) $(faad_cppflags) $<
-
-$(object_dir)/aac_afh.o: aac_afh.c | $(object_dir)
-       @[ -z "$(Q)" ] || echo 'CC $<'
-       $(Q) $(CC) -c -o $@ $(CPPFLAGS) $(DEBUG_CPPFLAGS) $(faad_cppflags) $<
 
+$(object_dir)/%.o: %.c | $(object_dir)
 $(object_dir)/opus%.o: CPPFLAGS += $(opus_cppflags)
-$(object_dir)/mp3_afh.o: CPPFLAGS += $(id3tag_cppflags)
+$(object_dir)/gui%.o: CPPFLAGS += $(curses_cppflags)
+$(object_dir)/spx%.o: CPPFLAGS += $(speex_cppflags)
+$(object_dir)/%.cmdline.o: CPPFLAGS += -Wno-unused-function
 
-$(object_dir)/mp3_afh.o: mp3_afh.c | $(object_dir)
+$(object_dir)/mp3_afh.o: CPPFLAGS += $(id3tag_cppflags)
+$(object_dir)/crypt.o: CPPFLAGS += $(openssl_cppflags)
+$(object_dir)/mp3dec_filter.o: CPPFLAGS += $(mad_cppflags)
+$(object_dir)/compress_filter.o: CPPFLAGS += -O3
+$(object_dir)/ao_write.o: CPPFLAGS += $(ao_cppflags)
+
+$(object_dir)/aacdec_filter.o \
+$(object_dir)/aac_common.o \
+$(object_dir)/aac_afh.o \
+: CPPFLAGS += $(faad_cppflags)
+
+$(object_dir)/spx_common.o \
+$(object_dir)/spxdec_filter.o \
+$(object_dir)/spx_afh.o \
+$(object_dir)/oggdec_filter.o \
+$(object_dir)/ogg_afh.o \
+$(object_dir)/ogg_afh_common.o \
+: CPPFLAGS += $(ogg_cppflags)
 
-$(object_dir)/gui%.o: gui%.c | $(object_dir)
-       @[ -z "$(Q)" ] || echo 'CC $<'
-       $(Q) $(CC) -c -o $@ $(CPPFLAGS) $(DEBUG_CPPFLAGS) $(curses_cppflags) $<
-$(object_dir)/ao_write.o: ao_write.c | $(object_dir)
+$(object_dir)/%.o: %.c | $(object_dir)
        @[ -z "$(Q)" ] || echo 'CC $<'
-       $(Q) $(CC) -c -o $@ $(CPPFLAGS) $(DEBUG_CPPFLAGS) $(ao_cppflags) $<
+       $(Q) $(CC) -c -o $@ $(CPPFLAGS) $(DEBUG_CPPFLAGS) $<
 
 $(object_dir)/%.cmdline.o: $(cmdline_dir)/%.cmdline.c $(cmdline_dir)/%.cmdline.h | $(object_dir)
        @[ -z "$(Q)" ] || echo 'CC $<'