diff options
Diffstat (limited to 'extra/gcc-uClibc/gcc-uClibc.c')
| -rw-r--r-- | extra/gcc-uClibc/gcc-uClibc.c | 166 |
1 files changed, 109 insertions, 57 deletions
diff --git a/extra/gcc-uClibc/gcc-uClibc.c b/extra/gcc-uClibc/gcc-uClibc.c index 999064290..42c8d5aad 100644 --- a/extra/gcc-uClibc/gcc-uClibc.c +++ b/extra/gcc-uClibc/gcc-uClibc.c @@ -6,32 +6,75 @@ * 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? */ -#ifdef DEBUG #include <stdio.h> -#endif - #include <stdlib.h> #include <string.h> #include <unistd.h> #include "gcc-uClibc.h" -#define UCLIBC_CRT0 UCLIBC_DIR"crt0.o" -#define UCLIBC_CRT0_G UCLIBC_CRT0 -#define UCLIBC_LIB UCLIBC_DIR"libc.a" -#define UCLIBC_SHAREDLIB "-luClibc" -#if 1 -#define UCLIBC_LIB_G UCLIBC_LIB -#define UCLIBC_SHAREDLIB_G UCLIBC_SHAREDLIB -#else -#define UCLIBC_LIB_G UCLIBC_DIR"libc.a-debug" +static char *rpath_link[] = { + "-Wl,-rpath-link,"UCLIBC_INSTALL_DIR"lib", + "-Wl,-rpath-link,"UCLIBC_BUILD_DIR +}; -#endif -#define UCLIBC_INC "-I"UCLIBC_DIR"include/" +static char *rpath[] = { + "-Wl,-rpath,"UCLIBC_INSTALL_DIR"lib", + "-Wl,-rpath,"UCLIBC_BUILD_DIR +}; + +static char *uClibc_inc[] = { + "-I"UCLIBC_INSTALL_DIR"include/", + "-I"UCLIBC_BUILD_DIR"include/" +}; + +static char *crt0_path[] = { + UCLIBC_INSTALL_DIR"lib/crt0.o", + UCLIBC_BUILD_DIR"crt0.o" +}; + +static char *lib_path[] = { + "-L"UCLIBC_INSTALL_DIR"lib", + "-L"UCLIBC_BUILD_DIR +}; static char static_linking[] = "-static"; static char nostdinc[] = "-nostdinc"; @@ -41,13 +84,30 @@ static char nostdlib[] = "-nostdlib"; int main(int argc, char **argv) { - int debugging = 0, linking = 1, use_static_linking = 0; + int use_build_dir = 0, 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; - int source_count; char ** gcc_argv; + char *ep; + + ep = getenv("UCLIBC_GCC"); + if (!ep) { + ep = ""; + } + + if ((strstr(argv[0],"build") != 0) || (strstr(ep,"build") != 0)) { + use_build_dir = 1; + } + + 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. */ - source_count = 0; /* 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 */ @@ -55,19 +115,21 @@ int main(int argc, char **argv) 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': - case 'S': - case 'E': - case 'r': + 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 'g': - if (argv[i][2] == 0) debugging = 1; + case 'v': /* verbose */ + if (argv[i][2] == 0) verbose = 1; break; case 'n': if (strcmp(nostdinc,argv[i]) == 0) { @@ -86,7 +148,7 @@ int main(int argc, char **argv) use_static_linking = 1; } break; - case 'W': + 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; @@ -119,50 +181,40 @@ int main(int argc, char **argv) } if (use_stdinc) { gcc_argv[i++] = nostdinc; - gcc_argv[i++] = UCLIBC_INC; + gcc_argv[i++] = uClibc_inc[use_build_dir]; gcc_argv[i++] = GCC_INCDIR; } if (linking && source_count) { - if (use_start) { - if (debugging) { - gcc_argv[i++] = UCLIBC_CRT0_G; - } else { - gcc_argv[i++] = UCLIBC_CRT0; + 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_build_dir || use_rpath) { + gcc_argv[i++] = rpath[use_build_dir]; } } + gcc_argv[i++] = rpath_link[use_build_dir]; /* just to be safe */ + gcc_argv[i++] = lib_path[use_build_dir]; + if (use_start) { + gcc_argv[i++] = crt0_path[use_build_dir]; + } if (use_stdlib) { gcc_argv[i++] = nostdlib; - if (use_static_linking) { - if (debugging) { - gcc_argv[i++] = UCLIBC_LIB_G; - } else { - gcc_argv[i++] = UCLIBC_LIB; - } - } else { - if (DYNAMIC_LINKER[0]) { /* not empty string */ - gcc_argv[i++] = "-Wl,--dynamic-linker,"DYNAMIC_LINKER; - } - if (debugging) { - gcc_argv[i++] = UCLIBC_SHAREDLIB_G; - } else { - gcc_argv[i++] = UCLIBC_SHAREDLIB; - } - } + gcc_argv[i++] = "-lc"; gcc_argv[i++] = GCC_LIB; } } gcc_argv[i++] = NULL; -#ifdef DEBUG - for ( j = 0 ; gcc_argv[j] ; j++ ) { - printf("arg[%2i] = %s\n", j, gcc_argv[j]); + 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 EXIT_SUCCESS; -#else + return execvp(GCC_BIN, gcc_argv); -#endif } - - - - |