diff options
Diffstat (limited to 'gcc/gcc.c')
| -rw-r--r-- | gcc/gcc.c | 42 |
1 files changed, 42 insertions, 0 deletions
@@ -8268,6 +8268,8 @@ driver::maybe_run_linker (const char *argv0) const { int tmp = execution_count; + detect_jobserver (); + if (! have_c) { #if HAVE_LTO_PLUGIN > 0 @@ -8357,6 +8359,46 @@ driver::final_actions () const } } +/* Detect whether jobserver is active and working. If not drop + --jobserver-auth from MAKEFLAGS. */ + +void +driver::detect_jobserver () const +{ + /* Detect jobserver and drop it if it's not working. */ + const char *makeflags = env.get ("MAKEFLAGS"); + if (makeflags != NULL) + { + const char *needle = "--jobserver-auth="; + const char *n = strstr (makeflags, needle); + if (n != NULL) + { + int rfd = -1; + int wfd = -1; + + bool jobserver + = (sscanf (n + strlen (needle), "%d,%d", &rfd, &wfd) == 2 + && rfd > 0 + && wfd > 0 + && fcntl (rfd, F_GETFD) >= 0 + && fcntl (wfd, F_GETFD) >= 0); + + /* Drop the jobserver if it's not working now. */ + if (!jobserver) + { + unsigned offset = n - makeflags; + char *dup = xstrdup (makeflags); + dup[offset] = '\0'; + + const char *space = strchr (makeflags + offset, ' '); + if (space != NULL) + strcpy (dup + offset, space); + xputenv (concat ("MAKEFLAGS=", dup, NULL)); + } + } + } +} + /* Determine what the exit code of the driver should be. */ int |