123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228 |
- /*
- * Copyright (C) 2000 Manuel Novoa III
- *
- * This is a crude wrapper to use uClibc with gcc.
- * It was originally written to work around ./configure for ext2fs-utils.
- * It certainly can be improved, but it works for me in the normal cases.
- *
- * April 7, 2001
- *
- * A bug was fixed in building the gcc command line when dynamic linking.
- * The functions dlopen, etc. now work. At this time, you must make sure
- * the correct libdl.so is included however. It is safest to, for example,
- * add /lib/libdl.so.1 if using ld-linux.so.1 rather than adding -ldl to the
- * command line.
- *
- * Note: This is only a problem if devel and target archs are the same. To
- * avoid the problem, you can use a customized dynamic linker.
- *
- *
- * April 18, 2001
- *
- * The wrapper now works with either installed and uninstalled uClibc versions.
- * If you want to use the uninstalled header files and libs, either include
- * the string "build" in the invocation name such as
- * 'ln -s <ARCH>-uclibc-gcc <ARCH>-uclibc-gcc-build'
- * or include it in the environment variable setting of UCLIBC_GCC.
- * Note: This automatically enables the "rpath" behavior described below.
- *
- * The wrapper will now pass the location of the uClibc shared libs used to
- * the linker with the "-rpath" option if the invocation name includes the
- * string "rpath" or if the environment variable UCLIBC_GCC include it (as
- * with "build" above). This is primarily intended to be used on devel
- * platforms of the same arch as the target. A good place to use this feature
- * would be in the uClibc/test directory.
- *
- * The wrapper now displays the command line passed to gcc when '-v' is used.
- *
- */
- /*
- *
- * TODO:
- * Check/modify gcc-specific environment variables?
- */
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <unistd.h>
- #include <sys/stat.h>
- #include "gcc-uClibc.h"
- static char *rpath_link[] = {
- "-Wl,-rpath-link,"UCLIBC_INSTALL_DIR"lib",
- "-Wl,-rpath-link,"UCLIBC_BUILD_DIR"lib"
- };
- static char *rpath[] = {
- "-Wl,-rpath,"UCLIBC_INSTALL_DIR"lib",
- "-Wl,-rpath,"UCLIBC_BUILD_DIR"lib"
- };
- static char *uClibc_inc[] = {
- "-I"UCLIBC_INSTALL_DIR"usr/include/",
- "-I"UCLIBC_BUILD_DIR"include/"
- };
- static char *crt0_path[] = {
- UCLIBC_INSTALL_DIR"lib/crt0.o",
- UCLIBC_BUILD_DIR"lib/crt0.o"
- };
- static char *lib_path[] = {
- "-L"UCLIBC_INSTALL_DIR"lib",
- "-L"UCLIBC_INSTALL_DIR"usr/lib",
- "-L"UCLIBC_BUILD_DIR"lib"
- "-L"UCLIBC_BUILD_DIR"usr/lib"
- };
- static char static_linking[] = "-static";
- static char nostdinc[] = "-nostdinc";
- static char nostartfiles[] = "-nostartfiles";
- static char nodefaultlibs[] = "-nodefaultlibs";
- static char nostdlib[] = "-nostdlib";
- int main(int argc, char **argv)
- {
- int linking = 1, use_static_linking = 0;
- int use_stdinc = 1, use_start = 1, use_stdlib = 1;
- int source_count = 0, use_rpath = 0, verbose = 0;
- int i, j;
- char ** gcc_argv;
- char *ep;
- ep = getenv("UCLIBC_GCC");
- if (!ep) {
- ep = "";
- }
- if ((strstr(argv[0],"rpath") != 0) || (strstr(ep,"rpath") != 0)) {
- use_rpath = 1;
- }
- #if 0
- /* Erik added this stuff in. Disabled but kept in case the new changes */
- /* don't do what he needed. */
- /* FIXME: We need to work out the install vs use-in-built-dir
- * issue..*/
- /* Apparently gcc doesn't accept this stuff via the command line */
- setenv("COMPILER_PATH", UCLIBC_DIR"extra/gcc-uClibc/", 1);
- setenv("LIBRARY_PATH", UCLIBC_DIR"lib/", 1);
- /* The double '/' works around a gcc bug */
- setenv("GCC_EXEC_PREFIX", UCLIBC_DIR"extra/gcc-uClibc//", 1);
- #endif
- for ( i = 1 ; i < argc ; i++ ) {
- if (argv[i][0] == '-') { /* option */
- switch (argv[i][1]) {
- case 'c': /* compile or assemble */
- case 'S': /* generate assembler code */
- case 'E': /* preprocess only */
- case 'r': /* partial-link */
- case 'i': /* partial-link */
- case 'M': /* map file generation */
- if (argv[i][2] == 0) linking = 0;
- break;
- case 'v': /* verbose */
- if (argv[i][2] == 0) verbose = 1;
- break;
- case 'n':
- if (strcmp(nostdinc,argv[i]) == 0) {
- use_stdinc = 0;
- } else if (strcmp(nostartfiles,argv[i]) == 0) {
- use_start = 0;
- } else if (strcmp(nodefaultlibs,argv[i]) == 0) {
- use_stdlib = 0;
- } else if (strcmp(nostdlib,argv[i]) == 0) {
- use_start = 0;
- use_stdlib = 0;
- }
- break;
- case 's':
- if (strcmp(static_linking,argv[i]) == 0) {
- use_static_linking = 1;
- }
- break;
- case 'W': /* -static could be passed directly to ld */
- if (strncmp("-Wl,",argv[i],4) == 0) {
- if (strstr(argv[i],static_linking) != 0) {
- use_static_linking = 1;
- }
- }
- break;
- case '-':
- if (strcmp(static_linking,argv[i]+1) == 0) {
- use_static_linking = 1;
- }
- break;
- }
- } else { /* assume it is an existing source file */
- ++source_count;
- }
- }
- #if 1
- gcc_argv = __builtin_alloca(sizeof(char*) * (argc + 20));
- #else
- if (!(gcc_argv = malloc(sizeof(char) * (argc + 20)))) {
- return EXIT_FAILURE;
- }
- #endif
- i = 0;
- gcc_argv[i++] = GCC_BIN;
- for ( j = 1 ; j < argc ; j++ ) {
- gcc_argv[i++] = argv[j];
- }
- if (use_stdinc) {
- gcc_argv[i++] = nostdinc;
- gcc_argv[i++] = uClibc_inc[0];
- gcc_argv[i++] = uClibc_inc[1];
- gcc_argv[i++] = GCC_INCDIR;
- }
- if (linking && source_count) {
- if (!use_static_linking) {
- if (DYNAMIC_LINKER[0]) { /* not empty string */
- gcc_argv[i++] = "-Wl,--dynamic-linker,"DYNAMIC_LINKER;
- if (strstr(DYNAMIC_LINKER,"uclibc") != 0) { /* custom linker */
- use_rpath = 0; /* so -rpath not needed for normal case */
- }
- }
- if (use_rpath) {
- gcc_argv[i++] = rpath[0];
- gcc_argv[i++] = rpath[1];
- }
- }
- gcc_argv[i++] = rpath_link[0]; /* just to be safe */
- gcc_argv[i++] = rpath_link[1]; /* just to be safe */
- gcc_argv[i++] = lib_path[0];
- gcc_argv[i++] = lib_path[1];
- if (use_start) {
- struct stat buf;
- if (stat(crt0_path[0], &buf) >= 0) {
- gcc_argv[i++] = crt0_path[0];
- } else {
- gcc_argv[i++] = crt0_path[1];
- }
- }
- if (use_stdlib) {
- gcc_argv[i++] = nostdlib;
- gcc_argv[i++] = "-lc";
- gcc_argv[i++] = GCC_LIB;
- }
- }
- gcc_argv[i++] = NULL;
- if (verbose) {
- printf("Invoked as %s\n", argv[0]);
- for ( j = 0 ; gcc_argv[j] ; j++ ) {
- printf("arg[%2i] = %s\n", j, gcc_argv[j]);
- }
- }
- return execvp(GCC_BIN, gcc_argv);
- }
|