1 files changed, 212 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/development/compilers/ios-cross-compile/alt_wrapper.c b/nixpkgs/pkgs/development/compilers/ios-cross-compile/alt_wrapper.c
new file mode 100644
index 000000000000..928b64e6fd9d
--- /dev/null
+++ b/nixpkgs/pkgs/development/compilers/ios-cross-compile/alt_wrapper.c
@@ -0,0 +1,212 @@
+/*
+  This and the shell builder was originally written by
+  https://github.com/tpoechtrager but I had to modify both so that
+  they played nicely and were reproducible with nixpkgs. Much thanks
+  to MixRank for letting me work on this.
+  Edgar Aroutiounian <edgar.factorial@gmail.com>
+ */
+
+#ifndef TARGET_CPU
+#define TARGET_CPU "armv7"
+#endif
+
+#ifndef OS_VER_MIN
+#define OS_VER_MIN "4.2"
+#endif
+
+#ifndef NIX_APPLE_HDRS
+#define NIX_APPLE_HDRS ""
+#endif
+
+#ifndef NIX_APPLE_FRAMEWORKS
+#define NIX_APPLE_FRAMEWORKS ""
+#endif
+
+#ifndef NIX_APPLE_PRIV_FRAMEWORKS
+#define NIX_APPLE_PRIV_FRAMEWORKS ""
+#endif
+
+#define _GNU_SOURCE
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <stddef.h>
+#include <unistd.h>
+#include <limits.h>
+
+#ifdef __APPLE__
+#include <mach-o/dyld.h>
+#endif
+
+#if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
+#include <sys/sysctl.h>
+#endif
+
+#ifdef __OpenBSD__
+#include <sys/types.h>
+#include <sys/user.h>
+#include <sys/stat.h>
+#endif
+
+char *get_executable_path(char *epath, size_t buflen)
+{
+  char *p;
+#ifdef __APPLE__
+  unsigned int l = buflen;
+  if (_NSGetExecutablePath(epath, &l) != 0) return NULL;
+#elif defined(__FreeBSD__) || defined(__DragonFly__)
+  int mib[4] = { CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME, -1 };
+  size_t l = buflen;
+  if (sysctl(mib, 4, epath, &l, NULL, 0) != 0) return NULL;
+#elif defined(__OpenBSD__)
+  int mib[4];
+  char **argv;
+  size_t len;
+  size_t l;
+  const char *comm;
+  int ok = 0;
+  mib[0] = CTL_KERN;
+  mib[1] = KERN_PROC_ARGS;
+  mib[2] = getpid();
+  mib[3] = KERN_PROC_ARGV;
+  if (sysctl(mib, 4, NULL, &len, NULL, 0) < 0)
+    abort();
+  if (!(argv = malloc(len)))
+    abort();
+  if (sysctl(mib, 4, argv, &len, NULL, 0) < 0)
+    abort();
+  comm = argv[0];
+  if (*comm == '/' || *comm == '.') {
+    char *rpath;
+    if ((rpath = realpath(comm, NULL))) {
+      strlcpy(epath, rpath, buflen);
+      free(rpath);
+      ok = 1;
+    }
+  } else {
+    char *sp;
+    char *xpath = strdup(getenv("PATH"));
+    char *path = strtok_r(xpath, ":", &sp);
+    struct stat st;
+    if (!xpath)
+      abort();
+    while (path) {
+      snprintf(epath, buflen, "%s/%s", path, comm);
+      if (!stat(epath, &st) && (st.st_mode & S_IXUSR)) {
+	ok = 1;
+	break;
+      }
+      path = strtok_r(NULL, ":", &sp);
+    }
+    free(xpath);
+  }
+  free(argv);
+  if (!ok) return NULL;
+  l = strlen(epath);
+#else
+  ssize_t l = readlink("/proc/self/exe", epath, buflen);
+#endif
+  if (l <= 0) return NULL;
+  epath[buflen - 1] = '\0';
+  p = strrchr(epath, '/');
+  if (p) *p = '\0';
+  return epath;
+}
+
+char *get_filename(char *str)
+{
+  char *p = strrchr(str, '/');
+  return p ? &p[1] : str;
+}
+
+void target_info(char *argv[], char **triple, char **compiler)
+{
+  char *p = get_filename(argv[0]);
+  char *x = strrchr(p, '-');
+  if (!x) abort();
+  *compiler = &x[1];
+  *x = '\0';
+  *triple = p;
+}
+
+void env(char **p, const char *name, char *fallback)
+{
+  char *ev = getenv(name);
+  if (ev) { *p = ev; return; }
+  *p = fallback;
+}
+
+int main(int argc, char *argv[])
+{
+  char **args = alloca(sizeof(char*) * (argc + 17));
+  int i, j;
+
+  char execpath[PATH_MAX+1];
+  char sdkpath[PATH_MAX+1];
+  char codesign_allocate[64];
+  char osvermin[64];
+
+  char *compiler, *target, *sdk, *cpu, *osmin;
+
+  target_info(argv, &target, &compiler);
+
+  if (!get_executable_path(execpath, sizeof(execpath))) abort();
+  snprintf(sdkpath, sizeof(sdkpath), "%s/../SDK", execpath);
+
+  snprintf(codesign_allocate, sizeof(codesign_allocate),
+	   "%s-codesign_allocate", target);
+
+  setenv("CODESIGN_ALLOCATE", codesign_allocate, 1);
+  setenv("IOS_FAKE_CODE_SIGN", "1", 1);
+
+  env(&sdk, "IOS_SDK_SYSROOT", sdkpath);
+  env(&cpu, "IOS_TARGET_CPU", TARGET_CPU);
+
+  env(&osmin, "IPHONEOS_DEPLOYMENT_TARGET", OS_VER_MIN);
+  unsetenv("IPHONEOS_DEPLOYMENT_TARGET");
+
+  snprintf(osvermin, sizeof(osvermin), "-miphoneos-version-min=%s", osmin);
+
+  for (i = 1; i < argc; ++i) {
+    if (!strcmp(argv[i], "-arch")) {
+      cpu = NULL;
+      break;
+    }
+  }
+
+  i = 0;
+
+  args[i++] = compiler;
+  args[i++] = "-target";
+  args[i++] = target;
+  args[i++] = "-isysroot";
+  args[i++] = sdk;
+  args[i++] = NIX_APPLE_HDRS;
+  args[i++] = "-F";
+  args[i++] = NIX_APPLE_FRAMEWORKS;
+  args[i++] = "-F";
+  args[i++] = NIX_APPLE_PRIV_FRAMEWORKS;
+
+  if (cpu) {
+    args[i++] = "-arch";
+    args[i++] = cpu;
+  }
+
+  args[i++] = osvermin;
+  args[i++] = "-mlinker-version=253.3";
+
+  for (j = 1; j < argc; ++i, ++j) args[i] = argv[j];
+
+  args[i] = NULL;
+
+  setenv("COMPILER_PATH", execpath, 1);
+  /* int k; */
+  /* for (k = 0; k < i; k++) */
+  /*   printf("Compiler option: %s\n", args[k]); */
+  /* printf("End of Compiler args\n"); */
+  execvp(compiler, args);
+
+  fprintf(stderr, "cannot invoke compiler, this is a serious bug\n");
+  return 1;
+}