2019-02-16 05:20:14 +00:00
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// HOSTSPEC is defined at compile time, see APKBUILD
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#include <errno.h>
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2019-06-25 06:29:37 +00:00
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#include <libgen.h>
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2019-02-16 05:20:14 +00:00
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#include <limits.h>
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2019-06-25 06:29:37 +00:00
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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2019-02-16 05:20:14 +00:00
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#include <unistd.h>
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2019-04-03 18:45:16 +00:00
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#define NATIVE_BIN_DIR "/native/usr/lib/ccache/bin"
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2019-06-25 06:29:37 +00:00
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void exit_userfriendly()
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{
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2019-02-16 05:20:14 +00:00
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fprintf(stderr, "Please report this at: https://gitlab.com/postmarketOS/pmaports/issues\n");
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fprintf(stderr, "As a workaround, you can compile without crossdirect.\n");
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fprintf(stderr, "See 'pmbootstrap -h' for related options.\n");
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exit(1);
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}
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2019-06-25 06:29:37 +00:00
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bool argv_has_arg(int argc, char **argv, const char *arg)
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{
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2019-04-14 01:40:49 +00:00
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size_t arg_len = strlen(arg);
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2019-06-25 06:29:37 +00:00
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for (int i = 1; i < argc; i++) {
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2019-04-14 01:40:49 +00:00
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if (strlen(argv[i]) < arg_len)
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continue;
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if (!memcmp(argv[i], arg, arg_len))
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return true;
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}
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return false;
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}
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2019-06-25 06:29:37 +00:00
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int main(int argc, char **argv)
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{
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2019-02-16 05:20:14 +00:00
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// we have a max of four extra args ("-target", "HOSTSPEC", "--sysroot=/", "-Wl,-rpath-link=/lib:/usr/lib"), plus one ending null
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2019-06-25 06:29:37 +00:00
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char *newargv[argc + 5];
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char *executableName = basename(argv[0]);
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2019-02-16 05:20:14 +00:00
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char newExecutable[PATH_MAX];
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bool isClang = (strcmp(executableName, "clang") == 0 || strcmp(executableName, "clang++") == 0);
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2019-06-25 06:29:37 +00:00
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bool startsWithHostSpec = (strncmp(HOSTSPEC, executableName, sizeof(HOSTSPEC) - 1) == 0);
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2019-02-16 05:20:14 +00:00
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2019-04-14 01:40:49 +00:00
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// linker is involved: just use qemu binary (to avoid broken cross-ld, pmaports#227)
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if (!argv_has_arg(argc, argv, "-c")) {
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snprintf(newExecutable, sizeof(newExecutable), "/usr/bin/%s", executableName);
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if (execv(newExecutable, argv) == -1) {
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fprintf(stderr, "ERROR: crossdirect: failed to execute %s: %s\n", newExecutable, strerror(errno));
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fprintf(stderr, "NOTE: this is a foreign arch binary that would run with qemu (linker is involved).\n");
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exit_userfriendly();
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}
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}
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2019-02-16 05:20:14 +00:00
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if (isClang || startsWithHostSpec) {
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2019-06-25 06:29:37 +00:00
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snprintf(newExecutable, sizeof(newExecutable), NATIVE_BIN_DIR "/%s", executableName);
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2019-02-16 05:20:14 +00:00
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} else {
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2019-06-25 06:29:37 +00:00
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snprintf(newExecutable, sizeof(newExecutable), NATIVE_BIN_DIR "/" HOSTSPEC "-%s", executableName);
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2019-02-16 05:20:14 +00:00
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}
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2019-06-25 06:29:37 +00:00
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char **newArgsPtr = newargv;
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2019-02-16 05:20:14 +00:00
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*newArgsPtr++ = newExecutable;
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if (isClang) {
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*newArgsPtr++ = "-target";
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*newArgsPtr++ = HOSTSPEC;
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}
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*newArgsPtr++ = "--sysroot=/";
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2019-04-14 01:40:49 +00:00
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2019-06-25 06:29:37 +00:00
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memcpy(newArgsPtr, argv + 1, sizeof(char *) * (argc - 1));
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2019-02-16 05:20:14 +00:00
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newArgsPtr += (argc - 1);
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*newArgsPtr = NULL;
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// new arguments prepared; now setup environmental vars
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2019-06-25 06:29:37 +00:00
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char *env[] = { "LD_PRELOAD=",
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2019-04-03 18:45:16 +00:00
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"LD_LIBRARY_PATH=/native/lib:/native/usr/lib",
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"CCACHE_PATH=/native/usr/bin",
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2019-06-25 06:29:37 +00:00
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NULL };
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char *ldPreload = getenv("LD_PRELOAD");
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2019-02-16 05:20:14 +00:00
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if (ldPreload) {
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if (strcmp(ldPreload, "/usr/lib/libfakeroot.so") == 0) {
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2019-04-03 18:45:16 +00:00
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env[0] = "LD_PRELOAD=/native/usr/lib/libfakeroot.so";
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2019-02-16 05:20:14 +00:00
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} else {
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fprintf(stderr, "ERROR: crossdirect: can't handle LD_PRELOAD: %s\n", ldPreload);
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exit_userfriendly();
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}
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}
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2019-04-03 18:45:16 +00:00
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if (execve(newExecutable, newargv, env) == -1) {
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2019-02-16 05:20:14 +00:00
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fprintf(stderr, "ERROR: crossdirect: failed to execute %s: %s\n", newExecutable, strerror(errno));
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2019-04-03 18:45:16 +00:00
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fprintf(stderr, "Maybe the target arch is missing in the ccache-cross-symlinks package?\n");
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2019-02-16 05:20:14 +00:00
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exit_userfriendly();
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}
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return 1;
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}
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