Fix the build process so it does not do the evil #ifdef BB_FOO stuff.

Build exactly one .o file per function, and let the linker throw away
the junk it doesn't want.
 -Erik

2 files changed, 32 insertions, 6 deletions

diff --git a/Makefile b/Makefile
index 89d56d50c..0474d17e3 100644
--- a/Makefile
+++ b/Makefile
@@ -246,7 +246,7 @@ mtab_file.c my_getgrnam.c my_getgrgid.c my_getpwnam.c my_getpwnamegid.c \
 my_getpwuid.c parse_mode.c parse_number.c perror_msg.c perror_msg_and_die.c \
 print_file.c process_escape_sequence.c read_package_field.c recursive_action.c \
 safe_read.c safe_strncpy.c syscalls.c syslog_msg_with_name.c time_string.c \
-trim.c unarchive.c unzip.c vdprintf.c verror_msg.c vperror_msg.c wfopen.c xfuncs.c \
+trim.c unzip.c vdprintf.c verror_msg.c vperror_msg.c wfopen.c xfuncs.c \
 xgetcwd.c xreadlink.c xregcomp.c interface.c remove_file.c last_char_is.c \
 copyfd.c vherror_msg.c herror_msg.c herror_msg_and_die.c xgethostbyname.c \
 dirname.c make_directory.c strdup_substr.c
@@ -262,6 +262,11 @@ memory_exhausted invalid_date invalid_option io_error dash_dash_help \
 write_error too_few_args name_longer_than_foo unknown
 LIBBB_MOBJ=$(patsubst %,$(LIBBB)/%.o, $(LIBBB_MESSAGES))
 
+LIBBB_ARCSRC=libbb/unarchive.c
+LIBBB_ARCOBJ= archive_offset seek_sub_file extract_archive unarchive \
+get_header_ar get_header_cpio get_header_tar deb_extract
+LIBBB_AROBJS=$(patsubst %,$(LIBBB)/%.o, $(LIBBB_ARCOBJ))
+
 
 # Put user-supplied flags at the end, where they
 # have a chance of winning.
@@ -365,10 +370,14 @@ $(LIBBB_MOBJ): $(LIBBB_MSRC)
 	- mkdir -p $(LIBBB)
 	$(CC) $(CFLAGS) $(LIBBB_CFLAGS) -DL_$(patsubst libbb/%,%,$*) -c $< -o $*.o
 
+$(LIBBB_AROBJS): $(LIBBB_ARCSRC)
+	- mkdir -p $(LIBBB)
+	$(CC) $(CFLAGS) $(LIBBB_CFLAGS) -DL_$(patsubst libbb/%,%,$*) -c $< -o $*.o
+
 libpwd.a: $(PWD_OBJS)
 	$(AR) $(ARFLAGS) $@ $^
 
-libbb.a:  $(LIBBB_MOBJ) $(LIBBB_OBJS)
+libbb.a:  $(LIBBB_MOBJ) $(LIBBB_AROBJS) $(LIBBB_OBJS)
 	$(AR) $(ARFLAGS) $@ $^
 
 usage.o: usage.h
diff --git a/libbb/unarchive.c b/libbb/unarchive.c
index 199123ec4..635dcae35 100644
--- a/libbb/unarchive.c
+++ b/libbb/unarchive.c
@@ -38,8 +38,19 @@ typedef struct file_headers_s {
 	dev_t device;
 } file_header_t;
 
+
+extern void seek_sub_file(FILE *src_stream, const int count);
+extern char *extract_archive(FILE *src_stream, FILE *out_stream, const file_header_t *file_entry,
+ const int function, const char *prefix);
+
+
+#ifdef L_archive_offset
 off_t archive_offset;
+#else
+extern off_t archive_offset;
+#endif	
 
+#ifdef L_seek_sub_file
 void seek_sub_file(FILE *src_stream, const int count)
 {
 	int i;
@@ -52,8 +63,11 @@ void seek_sub_file(FILE *src_stream, const int count)
 	}
 	return;
 }
+#endif	
 
 
+
+#ifdef L_extract_archive
 /* Extract the data postioned at src_stream to either filesystem, stdout or 
  * buffer depending on the value of 'function' which is defined in libbb.h 
  *
@@ -202,7 +216,9 @@ char *extract_archive(FILE *src_stream, FILE *out_stream, const file_header_t *f
 
 	return(NULL); /* Maybe we should say if failed */
 }
+#endif
 
+#ifdef L_unarchive
 char *unarchive(FILE *src_stream, void *(*get_headers)(FILE *),
 	const int extract_function, const char *prefix, char **extract_names)
 {
@@ -233,8 +249,9 @@ char *unarchive(FILE *src_stream, void *(*get_headers)(FILE *),
 	}
 	return(buffer);
 }
+#endif
 
-#if defined BB_AR || defined BB_DPKG_DEB || defined BB_DPKG
+#ifdef L_get_header_ar
 void *get_header_ar(FILE *src_stream)
 {
 	file_header_t *typed;
@@ -317,7 +334,7 @@ void *get_header_ar(FILE *src_stream)
 }
 #endif
 
-#if defined BB_CPIO
+#ifdef L_get_header_cpio
 void *get_header_cpio(FILE *src_stream)
 {
 	file_header_t *cpio_entry = NULL;
@@ -378,7 +395,7 @@ void *get_header_cpio(FILE *src_stream)
 }
 #endif
 
-#if defined BB_UNTAR || defined BB_DPKG_DEB || defined BB_DPKG
+#ifdef L_get_header_tar
 void *get_header_tar(FILE *tar_stream)
 {
 	union {
@@ -455,7 +472,7 @@ void *get_header_tar(FILE *tar_stream)
 }
 #endif
 
-#if defined BB_DPKG || defined BB_DPKG_DEB
+#ifdef L_deb_extract
 char *deb_extract(const char *package_filename, FILE *out_stream, const int extract_function,
 	const char *prefix, const char *filename)
 {