+++ /dev/null
-/* vi: set sw=4 ts=4: */
-/*
- * Copyright (C) 2000 Manuel Novoa III
- * Copyright (C) 2002-2003 Erik Andersen
- *
- * 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_ENV.
- * 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_ENV 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.
- *
- * May 31, 2001
- *
- * "rpath" and "build" behavior are now decoupled. You can of course get
- * the old "build" behavior by setting UCLIBC_ENV="rpath-build". Order
- * isn't important here, as only the substrings are searched for.
- *
- * Added environment variable check for UCLIBC_GCC_DLOPT to let user specify
- * an alternative dynamic linker at runtime without using command line args.
- * Since this wouldn't commonly be used, I made it easy on myself. You have
- * to match the option you would have passed to the gcc wrapper. As an
- * example,
- *
- * export UCLIBC_GCC_DLOPT="-Wl,--dynamic-linker,/lib/ld-alt-linker.so.3"
- *
- * This is really only useful if target arch == devel arch and DEVEL_PREFIX
- * isn't empty. It involves a recompile, but you can at least test apps
- * on your devel system if combined with the "rpath" behavor if by using
- * LD_LIBRARY_PATH, etc.
- *
- * Also added check for "-Wl,--dynamic-linker" on the command line. The
- * use default dynamic linker or the envirnment-specified dynamic linker
- * is disabled in that case.
- *
- * Added options --uclibc-use-build-dir and --uclibc-use-rpath so that those
- * behaviors can be invoked from the command line.
- *
- */
-
-/*
- *
- * TODO:
- * Check/modify gcc-specific environment variables?
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <stdarg.h>
-#include <string.h>
-#include <unistd.h>
-#include <errno.h>
-#include <sys/stat.h>
-#include <sys/wait.h>
-
-#include "gcc-uClibc.h"
-
-static char *our_usr_lib_path = "-L"UCLIBC_DEVEL_PREFIX"/lib";
-
-static char static_linking[] = "-static";
-static char nostdinc[] = "-nostdinc";
-static char nostartfiles[] = "-nostartfiles";
-static char nodefaultlibs[] = "-nodefaultlibs";
-static char nostdlib[] = "-nostdlib";
-#ifdef __UCLIBC_CTOR_DTOR__
-static char nostdinc_plus[] = "-nostdinc++";
-#endif
-
-/* Include a local implementation of basename, since this
- * uses the host system's C lib, and CYGWIN apparently
- * doesn't provide an implementation of basename(). */
-char *basename(const char *path)
-{
- register const char *s;
- register const char *p;
- p = s = path;
- while (*s) {
- if (*s++ == '/') {
- p = s;
- }
- }
- return (char *) p;
-}
-
-char *dirname(char *path)
-{
- static const char null_or_empty_or_noslash[] = ".";
- register char *s;
- register char *last;
- char *first;
-
- last = s = path;
-
- if (s != NULL) {
-
-LOOP:
- while (*s && (*s != '/')) ++s;
- first = s;
- while (*s == '/') ++s;
- if (*s) {
- last = first;
- goto LOOP;
- }
-
- if (last == path) {
- if (*last != '/') {
- goto DOT;
- }
- if ((*++last == '/') && (last[1] == '\0')) {
- ++last;
- }
- }
- *last = '\0';
- return path;
- }
-DOT:
- return (char *) null_or_empty_or_noslash;
-}
-
-
-extern void *xmalloc(size_t size)
-{
- void *ptr = malloc(size);
-
- if (!ptr) {
- fprintf(stderr, "memory exhausted");
- exit(EXIT_FAILURE);
- }
- return ptr;
-}
-
-void xstrcat(char **string, ...)
-{
- const char *c;
- va_list p;
- /* Don't bother to calculate how big exerything
- * will be, just be careful to not overflow... */
- va_start(p, string);
- *string = xmalloc(BUFSIZ);
- **string = '\0';
- while ((c = va_arg(p, const char *))) {
- strcat(*string, c);
- }
- va_end(p);
-}
-
-int main(int argc, char **argv)
-{
- int use_build_dir = 0, linking = 1, use_static_linking = 0;
- int use_stdinc = 1, use_start = 1, use_stdlib = 1, use_pic = 0;
- int source_count = 0, use_rpath = 0, verbose = 0;
- int minusx = 0;
- int i, j, k, l, m, n;
- char ** gcc_argv;
- char ** gcc_argument;
- char ** libraries;
- char ** libpath;
- char *dlstr;
- char *incstr;
- char *devprefix;
- char *builddir;
- char *libstr;
- char *build_dlstr = NULL;
- char *cc;
- char *ep;
- char *rpath_link[2];
- char *rpath[2];
- char *uClibc_inc[2];
- char *our_lib_path[2];
- char *crt0_path[2];
- char *crtbegin_path[2];
- char *crtend_path[2];
- const char *application_name;
-#ifdef __UCLIBC_CTOR_DTOR__
- char *crti_path[2];
- char *crtn_path[2];
- int len;
- int ctor_dtor = 1, cplusplus = 0, use_nostdinc_plus = 0;
- int findlibgcc = 1;
- char *cpp = NULL;
-#endif
-#ifdef __UCLIBC_PROFILING__
- int profile = 0;
- char *gcrt1_path[2];
-#endif
-
- cc = getenv("UCLIBC_CC");
- if (cc == NULL) {
- cc = GCC_BIN;
-#ifdef __UCLIBC_CTOR_DTOR__
- findlibgcc = 0;
-#endif
- }
-
- application_name = basename(argv[0]);
- if (application_name[0] == '-')
- application_name++;
-
-#ifdef __UCLIBC_CTOR_DTOR__
- /* We must use strstr since g++ might be named like a
- * cross compiler (i.e. arm-linux-g++). We must also
- * search carefully, in case we are searching something
- * like /opt/c++/gcc-3.1/bin/arm-linux-g++ or some similar
- * perversion... */
- len = strlen(application_name);
- if ((strcmp(application_name+len-3, "g++") == 0) ||
- (strcmp(application_name+len-3, "c++") == 0)) {
- len = strlen(cc);
- if (strcmp(cc+len-3, "gcc") == 0) {
- cpp = strdup(cc);
- cpp[len-1] = '+';
- cpp[len-2] = '+';
- }
- cplusplus = 1;
- use_nostdinc_plus = 1;
- }
-#endif
-
- devprefix = getenv("UCLIBC_DEVEL_PREFIX");
- if (!devprefix) {
- devprefix = UCLIBC_DEVEL_PREFIX;
- }
-
- builddir = getenv("UCLIBC_BUILD_DIR");
- if (!builddir) {
- builddir = UCLIBC_BUILD_DIR;
- }
-
- incstr = getenv("UCLIBC_GCC_INC");
- libstr = getenv("UCLIBC_GCC_LIB");
-
- ep = getenv("UCLIBC_ENV");
- if (!ep) {
- ep = "";
- }
-
- if (strstr(ep,"build") != NULL) {
- use_build_dir = 1;
- }
-
- if (strstr(ep,"rpath") != NULL) {
- use_rpath = 1;
- }
-
-
- xstrcat(&(rpath_link[0]), "-Wl,-rpath-link,", devprefix, "/lib", NULL);
- xstrcat(&(rpath_link[1]), "-Wl,-rpath-link,", builddir, "/lib", NULL);
-
- xstrcat(&(rpath[0]), "-Wl,-rpath,", devprefix, "/lib", NULL);
- xstrcat(&(rpath[1]), "-Wl,-rpath,", builddir, "/lib", NULL);
-
- xstrcat(&(uClibc_inc[0]), devprefix, "/include/", NULL);
- xstrcat(&(uClibc_inc[1]), builddir, "/include/", NULL);
-
-#ifdef __UCLIBC_CTOR_DTOR__
- xstrcat(&(crt0_path[0]), devprefix, "/lib/crt1.o", NULL);
- xstrcat(&(crt0_path[1]), builddir, "/lib/crt1.o", NULL);
- xstrcat(&(crti_path[0]), devprefix, "/lib/crti.o", NULL);
- xstrcat(&(crti_path[1]), builddir, "/lib/crti.o", NULL);
- xstrcat(&(crtn_path[0]), devprefix, "/lib/crtn.o", NULL);
- xstrcat(&(crtn_path[1]), builddir, "/lib/crtn.o", NULL);
-#else
- xstrcat(&(crt0_path[0]), devprefix, "/lib/crt0.o", NULL);
- xstrcat(&(crt0_path[1]), builddir, "/lib/crt0.o", NULL);
-#endif
-#ifdef __UCLIBC_PROFILING__
- xstrcat(&(gcrt1_path[0]), devprefix, "/lib/gcrt1.o", NULL);
- xstrcat(&(gcrt1_path[1]), builddir, "/lib/gcrt1.o", NULL);
-#endif
-
- xstrcat(&(our_lib_path[0]), "-L", devprefix, "/lib", NULL);
- xstrcat(&(our_lib_path[1]), "-L", builddir, "/lib", NULL);
-
-#ifdef __UCLIBC_HAS_SHARED__
- build_dlstr = "-Wl,--dynamic-linker," BUILD_DYNAMIC_LINKER;
- dlstr = getenv("UCLIBC_GCC_DLOPT");
- if (!dlstr) {
- dlstr = "-Wl,--dynamic-linker," DYNAMIC_LINKER;
- }
-#endif
-
- m = 0;
- libraries = __builtin_alloca(sizeof(char*) * (argc));
- libraries[m] = NULL;
-
- n = 0;
- libpath = __builtin_alloca(sizeof(char*) * (argc));
- libpath[n] = NULL;
-
- for ( i = 1 ; i < argc ; i++ ) {
- if (argv[i][0] == '-' && argv[i][1] != '\0') { /* option */
- switch (argv[i][1]) {
- case 'c': /* compile or assemble */
- case 'S': /* generate assembler code */
- case 'E': /* preprocess only */
- case 'M': /* generate dependencies */
- linking = 0;
- break;
- case 'L': /* library */
- libpath[n++] = argv[i];
- libpath[n] = NULL;
- if (argv[i][2] == '\0') {
- argv[i] = NULL;
- libpath[n++] = argv[++i];
- libpath[n] = NULL;
- }
- argv[i] = NULL;
- break;
- case 'l': /* library */
- libraries[m++] = argv[i];
- libraries[m] = NULL;
- argv[i] = NULL;
- break;
- case 'x': /* Set target language */
- minusx = 1;
- i++;
- break;
- case 'v': /* verbose */
- if (argv[i][2] == '\0') verbose = 1;
- printf("Invoked as %s\n", argv[0]);
- break;
- case 'n':
- if (strcmp(nostdinc, argv[i]) == 0) {
- use_stdinc = 0;
- } else if (strcmp(nostartfiles, argv[i]) == 0) {
-#ifdef __UCLIBC_CTOR_DTOR__
- ctor_dtor = 0;
-#endif
- use_start = 0;
- } else if (strcmp(nodefaultlibs, argv[i]) == 0) {
- use_stdlib = 0;
- argv[i] = NULL;
- } else if (strcmp(nostdlib, argv[i]) == 0) {
-#ifdef __UCLIBC_CTOR_DTOR__
- ctor_dtor = 0;
-#endif
- use_start = 0;
- use_stdlib = 0;
- }
-#ifdef __UCLIBC_CTOR_DTOR__
- else if (strcmp(nostdinc_plus, argv[i]) == 0) {
- if (cplusplus) {
- use_nostdinc_plus = 0;
- }
- }
-#endif
- break;
- case 's':
- if (strstr(argv[i], static_linking) != NULL) {
- use_static_linking = 1;
- }
- if (strcmp("-shared", argv[i]) == 0) {
- use_start = 0;
- use_pic = 1;
- }
- break;
- case 'W': /* -static could be passed directly to ld */
- if (strncmp("-Wl,", argv[i], 4) == 0) {
- if (strstr(argv[i], static_linking) != NULL) {
- use_static_linking = 1;
- }
- if (strstr(argv[i], "--dynamic-linker") != NULL) {
- dlstr = NULL;
- }
- }
- break;
-#ifdef __UCLIBC_PROFILING__
- case 'p':
- if (strcmp("-pg", argv[i]) == 0) {
- profile = 1;
- }
- break;
-#endif
- case 'f':
- /* Check if we are doing PIC */
- if (strcmp("-fPIC", argv[i]) == 0) {
- use_pic = 1;
- } else if (strcmp("-fpic", argv[i]) == 0) {
- use_pic = 1;
- }
-#ifdef __UCLIBC_PROFILING__
- else if (strcmp("-fprofile-arcs", argv[i]) == 0) {
- profile = 1;
- }
-#endif
- break;
-
- case '-':
- if (strstr(argv[i]+1, static_linking) != NULL) {
- use_static_linking = 1;
- argv[i] = NULL;
- } else if (strcmp("--uclibc-use-build-dir", argv[i]) == 0) {
- use_build_dir = 1;
- argv[i] = NULL;
- } else if (strcmp("--uclibc-use-rpath", argv[i]) == 0) {
- use_rpath = 1;
- argv[i] = NULL;
- } else if (strcmp ("--uclibc-cc", argv[i]) == 0 && argv[i + 1]) {
- cc = argv[i + 1];
- argv[i++] = NULL;
- argv[i] = NULL;
- } else if (strncmp ("--uclibc-cc=", argv[i], 12) == 0) {
- cc = argv[i] + 12;
- argv[i] = NULL;
- }
-#ifdef __UCLIBC_CTOR_DTOR__
- else if (strcmp("--uclibc-no-ctors",argv[i]) == 0) {
- ctor_dtor = 0;
- argv[i] = NULL;
- }
-#endif
- break;
- }
- } else if (argv[i][0] == '-' && argv[i][1] == '\0') {
- /* Reading code from stdin - crazy eh? */
- ++source_count;
- } else { /* assume it is an existing source file */
- ++source_count;
- }
- }
-
- gcc_argv = __builtin_alloca(sizeof(char*) * (argc + 64));
- gcc_argument = __builtin_alloca(sizeof(char*) * (argc + 20));
-
- i = 0; k = 0;
-#ifdef __UCLIBC_CTOR_DTOR__
- if (ctor_dtor) {
- struct stat statbuf;
- if (findlibgcc || stat(LIBGCC_DIR, &statbuf) < 0 ||
- !S_ISDIR(statbuf.st_mode))
- {
- /* Bummer, gcc is hiding from us. This is going
- * to really slow things down... bummer. */
- int status, gcc_pipe[2];
- pid_t pid, wpid;
-
- pipe(gcc_pipe);
- if (!(pid = fork())) {
- char *argv[4];
- close(gcc_pipe[0]);
- close(1);
- close(2);
- dup2(gcc_pipe[1], 1);
- dup2(gcc_pipe[1], 2);
- argv[0] = cc;
- argv[1] = "-print-libgcc-file-name";
- argv[2] = NULL;
- execvp(cc, argv);
- close(gcc_pipe[1]);
- _exit(EXIT_FAILURE);
- }
- wpid = 0;
- while (wpid != pid) {
- wpid = wait(&status);
- }
- close(gcc_pipe[1]);
- if (WIFEXITED(status) && WEXITSTATUS(status)) {
-crash_n_burn:
- fprintf(stderr, "Unable to locale crtbegin.o provided by gcc");
- exit(EXIT_FAILURE);
- }
- if (WIFSIGNALED(status)) {
- fprintf(stderr, "%s exited because of uncaught signal %d", cc, WTERMSIG(status));
- exit(EXIT_FAILURE);
- }
-
- {
- char buf[1024], *dir;
- status = read(gcc_pipe[0], buf, sizeof(buf));
- close(gcc_pipe[0]);
- if (status < 0) {
- goto crash_n_burn;
- }
- dir = dirname(buf);
- xstrcat(&(crtbegin_path[0]), dir, "/crtbegin.o", NULL);
- xstrcat(&(crtbegin_path[1]), dir, "/crtbeginS.o", NULL);
- xstrcat(&(crtend_path[0]), dir, "/crtend.o", NULL);
- xstrcat(&(crtend_path[1]), dir, "/crtendS.o", NULL);
- }
-
- } else {
- xstrcat(&(crtbegin_path[0]), LIBGCC_DIR, "crtbegin.o", NULL);
- xstrcat(&(crtbegin_path[1]), LIBGCC_DIR, "crtbeginS.o", NULL);
- xstrcat(&(crtend_path[0]), LIBGCC_DIR, "crtend.o", NULL);
- xstrcat(&(crtend_path[1]), LIBGCC_DIR, "crtendS.o", NULL);
- }
- }
-
- if (cplusplus && cpp)
- gcc_argv[i++] = cpp;
- else
-#endif
- gcc_argv[i++] = cc;
-
- for ( j = 1 ; j < argc ; j++ ) {
- if (argv[j] != NULL) {
- gcc_argument[k++] = argv[j];
- }
- }
- gcc_argument[k] = NULL;
-
- if (linking && source_count) {
-#if defined __HAVE_ELF__ && ! defined __UCLIBC_HAS_MMU__
- gcc_argv[i++] = "-Wl,-elf2flt";
-#endif
- gcc_argv[i++] = nostdlib;
- if (use_static_linking) {
- gcc_argv[i++] = static_linking;
- }
- if (!use_static_linking) {
- if (dlstr && use_build_dir) {
- gcc_argv[i++] = build_dlstr;
- } else if (dlstr) {
- gcc_argv[i++] = dlstr;
- }
- if (use_rpath) {
- gcc_argv[i++] = rpath[use_build_dir];
- }
- }
- for ( l = 0 ; l < n ; l++ ) {
- if (libpath[l]) gcc_argv[i++] = libpath[l];
- }
- gcc_argv[i++] = rpath_link[use_build_dir]; /* just to be safe */
- if (libstr)
- gcc_argv[i++] = libstr;
- gcc_argv[i++] = our_lib_path[use_build_dir];
- if (!use_build_dir) {
- gcc_argv[i++] = our_usr_lib_path;
- }
- }
- if (use_stdinc && source_count) {
- gcc_argv[i++] = nostdinc;
-#ifdef __UCLIBC_CTOR_DTOR__
- if (cplusplus) {
- char *cppinc;
- if (use_nostdinc_plus) {
- gcc_argv[i++] = nostdinc_plus;
- }
- xstrcat(&cppinc, uClibc_inc[use_build_dir], "g++/", NULL);
- gcc_argv[i++] = "-isystem";
- gcc_argv[i++] = cppinc;
- xstrcat(&cppinc, uClibc_inc[use_build_dir], "g++-v3/", NULL);
- gcc_argv[i++] = "-isystem";
- gcc_argv[i++] = cppinc;
- }
-#endif
- gcc_argv[i++] = "-isystem";
- gcc_argv[i++] = uClibc_inc[use_build_dir];
- gcc_argv[i++] = "-iwithprefix";
- gcc_argv[i++] = "include";
- if (incstr)
- gcc_argv[i++] = incstr;
- }
-
- if (linking && source_count) {
-
-#ifdef __UCLIBC_PROFILING__
- if (profile) {
- gcc_argv[i++] = gcrt1_path[use_build_dir];
- }
-#endif
-#ifdef __UCLIBC_CTOR_DTOR__
- if (ctor_dtor) {
- gcc_argv[i++] = crti_path[use_build_dir];
- if (use_pic) {
- gcc_argv[i++] = crtbegin_path[1];
- } else {
- gcc_argv[i++] = crtbegin_path[0];
- }
- }
-#endif
- if (use_start) {
-#ifdef __UCLIBC_PROFILING__
- if (!profile)
-#endif
- {
- gcc_argv[i++] = crt0_path[use_build_dir];
- }
- }
- for ( l = 0 ; l < k ; l++ ) {
- if (gcc_argument[l]) gcc_argv[i++] = gcc_argument[l];
- }
- if (use_stdlib) {
- //gcc_argv[i++] = "-Wl,--start-group";
- gcc_argv[i++] = "-lgcc";
- }
- for ( l = 0 ; l < m ; l++ ) {
- if (libraries[l]) gcc_argv[i++] = libraries[l];
- }
- if (use_stdlib) {
-#ifdef __UCLIBC_CTOR_DTOR__
- if (cplusplus) {
- gcc_argv[i++] = "-lstdc++";
- gcc_argv[i++] = "-lm";
- }
-#endif
- gcc_argv[i++] = "-lc";
- gcc_argv[i++] = "-lgcc";
- //gcc_argv[i++] = "-Wl,--end-group";
- }
-#ifdef __UCLIBC_CTOR_DTOR__
- if (ctor_dtor) {
- if (minusx) {
- gcc_argv[i++] = "-x";
- gcc_argv[i++] = "none";
- }
- if (use_pic) {
- gcc_argv[i++] = crtend_path[1];
- } else {
- gcc_argv[i++] = crtend_path[0];
- }
-
- gcc_argv[i++] = crtn_path[use_build_dir];
- }
-#endif
- } else {
- for ( l = 0 ; l < k ; l++ ) {
- if (gcc_argument[l]) gcc_argv[i++] = gcc_argument[l];
- }
- }
- gcc_argv[i++] = NULL;
-
- if (verbose) {
- for ( j = 0 ; gcc_argv[j] ; j++ ) {
- printf("arg[%2i] = %s\n", j, gcc_argv[j]);
- }
- fflush(stdout);
- }
- //no need to free memory from xstrcat because we never return...
-#ifdef __UCLIBC_CTOR_DTOR__
- if (cplusplus && cpp) {
- execvp(cpp, gcc_argv);
- fprintf(stderr, "%s: %s\n", cpp, strerror(errno));
- } else
-#endif
- {
- execvp(cc, gcc_argv);
- fprintf(stderr, "%s: %s\n", cc, strerror(errno));
- }
- exit(EXIT_FAILURE);
-}
OSDN Git Service
