78 lines
2.5 KiB
C
78 lines
2.5 KiB
C
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// HOSTSPEC is defined at compile time, see APKBUILD
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdbool.h>
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#include <libgen.h>
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#include <errno.h>
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#include <limits.h>
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#include <unistd.h>
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void exit_userfriendly() {
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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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int main(int argc, char** argv) {
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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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char* newargv[argc + 5];
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char* executableName = basename(argv[0]);
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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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bool startsWithHostSpec = (strncmp(HOSTSPEC, executableName, sizeof(HOSTSPEC) -1) == 0);
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if (isClang || startsWithHostSpec) {
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snprintf(newExecutable, sizeof(newExecutable), "/native/usr/bin/%s", executableName);
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} else {
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snprintf(newExecutable, sizeof(newExecutable), "/native/usr/bin/" HOSTSPEC "-%s", executableName);
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}
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char** newArgsPtr = newargv;
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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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bool addrpath = true;
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if (isClang) {
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// clang gives a warning if the rpath parameter is passed when linker isn't invoked.
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// to avoid this warning, only add if we're actually linking at least one library.
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addrpath = false;
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for (int i = 1; i < argc; i++) {
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char* arg = argv[i];
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if (strlen(arg) >= 2 && arg[0] == '-' && arg[1] == 'l') {
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addrpath = true;
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break;
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}
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}
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}
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if (addrpath) {
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*newArgsPtr++ = "-Wl,-rpath-link=/lib:/usr/lib";
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}
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memcpy(newArgsPtr, argv + 1, sizeof(char*)*(argc - 1));
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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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setenv("LD_LIBRARY_PATH", "/native/lib:/native/usr/lib", true);
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char* ldPreload = getenv("LD_PRELOAD");
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if (ldPreload) {
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if (strcmp(ldPreload, "/usr/lib/libfakeroot.so") == 0) {
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setenv("LD_PRELOAD", "/native/usr/lib/libfakeroot.so", true);
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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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if (execv(newExecutable, newargv) == -1) {
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fprintf(stderr, "ERROR: crossdirect: failed to execute %s: %s\n", newExecutable, strerror(errno));
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exit_userfriendly();
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}
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return 1;
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}
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