tccelf: load libtcc1.a from library path

... rather than from tccdir.  Also allows to load cross
versions of bcheck.o etc. (if we would build them which
we currently don't).

18 insertions(+), 24 deletions(-)

Makefile

@@ -172,10 +172,10 @@ DEFINES += $(DEF-$(or $(findstring win,$T),unx))
 
 ifneq ($(X),)
 ifeq ($(CONFIG_WIN32),yes)
-DEF-win += -DTCC_LIBTCC1="\"$(X)libtcc1.a\""
-DEF-unx += -DTCC_LIBTCC1="\"lib/$(X)libtcc1.a\""
+DEF-win += -DCONFIG_TCC_CROSSPREFIX="\"$X\""
+DEF-unx += -DCONFIG_TCC_CROSSPREFIX="\"lib/$X\""
 else
-DEF-all += -DTCC_LIBTCC1="\"$(X)libtcc1.a\""
+DEF-all += -DCONFIG_TCC_CROSSPREFIX="\"$X\""
 DEF-win += -DCONFIG_TCCDIR="\"$(tccdir)/win32\""
 endif
 endif

libtcc.c

@@ -1167,14 +1167,24 @@ static int tcc_add_library_internal(TCCState *s, const char *fmt,
     return -1;
 }
 
-#ifndef TCC_TARGET_MACHO
 /* find and load a dll. Return non zero if not found */
 ST_FUNC int tcc_add_dll(TCCState *s, const char *filename, int flags)
 {
     return tcc_add_library_internal(s, "%s/%s", filename, flags,
         s->library_paths, s->nb_library_paths);
 }
+
+/* find [cross-]libtcc1.a and tcc helper objects in library path */
+ST_FUNC void tcc_add_support(TCCState *s1, const char *filename)
+{
+#ifdef CONFIG_TCC_CROSSPREFIX
+    char buf[100];
+    snprintf(buf, sizeof buf, "%s%s", CONFIG_TCC_CROSSPREFIX, filename);
+    filename = buf;
 #endif
+    if (tcc_add_dll(s1, filename, 0) < 0)
+        tcc_error_noabort("%s not found", filename);
+}
 
 #if !defined TCC_TARGET_PE && !defined TCC_TARGET_MACHO
 ST_FUNC int tcc_add_crt(TCCState *s1, const char *filename)

tcc.h

@@ -203,8 +203,7 @@ extern long double strtold (const char *__nptr, char **__endptr);
 # endif
 #endif
 
-#if !defined TCC_IS_NATIVE \
-    || (defined CONFIG_TCC_BACKTRACE && CONFIG_TCC_BACKTRACE==0)
+#if defined CONFIG_TCC_BACKTRACE && CONFIG_TCC_BACKTRACE==0
 # undef CONFIG_TCC_BACKTRACE
 #else
 # define CONFIG_TCC_BACKTRACE 1 /* enable builtin stack backtraces */
@@ -285,7 +284,8 @@ extern long double strtold (const char *__nptr, char **__endptr);
 #  define CONFIG_TCC_LIBPATHS "{B}/lib"
 # else
 #  define CONFIG_TCC_LIBPATHS \
-        ALSO_TRIPLET(CONFIG_SYSROOT "/usr/" CONFIG_LDDIR) \
+        "{B}" \
+    ":" ALSO_TRIPLET(CONFIG_SYSROOT "/usr/" CONFIG_LDDIR) \
     ":" ALSO_TRIPLET(CONFIG_SYSROOT "/" CONFIG_LDDIR) \
     ":" ALSO_TRIPLET(CONFIG_SYSROOT "/usr/local/" CONFIG_LDDIR)
 # endif
@@ -1264,9 +1264,8 @@ ST_FUNC int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
 #ifndef ELF_OBJ_ONLY
 ST_FUNC int tcc_add_crt(TCCState *s, const char *filename);
 #endif
-#ifndef TCC_TARGET_MACHO
 ST_FUNC int tcc_add_dll(TCCState *s, const char *filename, int flags);
-#endif
+ST_FUNC void tcc_add_support(TCCState *s1, const char *filename);
 #ifdef CONFIG_TCC_BCHECK
 ST_FUNC void tcc_add_bcheck(TCCState *s1);
 #endif

tccelf.c

@@ -1299,15 +1299,6 @@ static void add_init_array_defines(TCCState *s1, const char *section_name)
     set_global_sym(s1, buf, s, end_offset);
 }
 
-#ifndef TCC_TARGET_PE
-static void tcc_add_support(TCCState *s1, const char *filename)
-{
-    char buf[1024];
-    snprintf(buf, sizeof(buf), "%s/%s", s1->tcc_lib_path, filename);
-    tcc_add_file(s1, buf);
-}
-#endif
-
 ST_FUNC void add_array (TCCState *s1, const char *sec, int c)
 {
     Section *s;

tccpe.c

@@ -1858,12 +1858,6 @@ ST_FUNC void pe_add_unwind_data(unsigned start, unsigned end, unsigned stack)
 #define PE_STDSYM(n,s) "_" n s
 #endif
 
-static void tcc_add_support(TCCState *s1, const char *filename)
-{
-    if (tcc_add_dll(s1, filename, 0) < 0)
-        tcc_error_noabort("%s not found", filename);
-}
-
 static void pe_add_runtime(TCCState *s1, struct pe_info *pe)
 {
     const char *start_symbol;