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/* $Id$ */
/*
* Copyright (C) 2014 Teluu Inc. (http://www.teluu.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* A simple proxy application for gcc/g++ to remove '-mno-cygwin' option
* when the gcc/g++ doesn't support it. Note that the option seems to be
* deprecated and causing compile error since gcc 4.7, while the option is
* auto-generated by Python distutils module (up to Python 2.7) in building
* Python extension.
*/
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
/* Find gcc executable from env var PATH but omitting current dir */
const char* find_gcc(const char *gcc_exe)
{
static char fname[256];
char spath[1024 * 10];
char *p;
p = getenv("PATH");
if (strlen(p) >= sizeof(spath)) {
printf("Error: find_gcc() not enough buffer 1\n");
return NULL;
}
strncpy(spath, p, sizeof(spath));
p = strtok(spath, ";");
while (p) {
int len;
/* Skip current dir */
if (strcmp(p, ".") == 0) {
p = strtok(NULL, ";");
continue;
}
len = snprintf(fname, sizeof(fname), "%s\\%s", p, gcc_exe);
if (len < 0 || len >= sizeof(fname)) {
printf("Error: find_gcc() not enough buffer 2\n");
return NULL;
}
if (access(fname, F_OK | X_OK) != -1) {
return fname;
}
p = strtok(NULL, ";");
}
return NULL;
}
int check_gcc_reject_mno_cygwin(const char *gcc_path)
{
FILE *fp;
char tmp[1024];
const char *p;
int ver;
snprintf(tmp, sizeof(tmp), "%s -mno-cygwin 2>&1", gcc_path);
fp = popen(tmp, "r");
if (fp == NULL) {
printf("Error: failed to run gcc\n" );
return -1;
}
while (fgets(tmp, sizeof(tmp), fp) != NULL) {
if (strstr(tmp, "unrecognized") && strstr(tmp, "-mno-cygwin"))
return 1;
}
pclose(fp);
return 0;
}
int main(int argc, const char const **argv)
{
const char *app = "python cc_mingw.py";
char cmd[1024 * 8], *p;
int i, len, sz;
int ret = 0;
const char *spath, *gcc_exe;
int remove_mno_cygwin;
if (strstr(argv[0], "gcc") || strstr(argv[0], "GCC")) {
gcc_exe = "gcc.exe";
} else if (strstr(argv[0], "g++") || strstr(argv[0], "G++")) {
gcc_exe = "g++.exe";
} else {
printf("Error: app name not gcc/g++\n");
return -10;
}
/* Resolve GCC path from PATH env var */
gcc_exe = find_gcc(gcc_exe);
if (!gcc_exe) {
printf("Error: real gcc/g++ not found\n");
return -20;
}
/* Check if GCC rejects '-mno-cygwin' option */
remove_mno_cygwin = check_gcc_reject_mno_cygwin(gcc_exe);
if (remove_mno_cygwin < 0)
return -30;
len = snprintf(cmd, sizeof(cmd), "%s", gcc_exe);
p = cmd + len;
sz = sizeof(cmd) - len;
for (i = 1; i < argc && sz > 0; ++i) {
if (remove_mno_cygwin && strcmp(argv[i], "-mno-cygwin") == 0) {
printf("Removed option '-mno-cygwin'.\n");
continue;
}
len = snprintf(p, sz, " %s", argv[i]);
if (len < 0 || len >= sz) {
ret = E2BIG;
break;
}
p += len;
sz -= len;
}
if (!ret) {
//printf("cmd = %s\n", cmd);
ret = system(cmd);
}
if (ret) {
printf("Error: %s\n", strerror(ret));
}
return ret;
}
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