diff options
| author | Guillem Jover <guillem@hadrons.org> | 2016-08-28 17:13:20 +0200 |
|---|---|---|
| committer | Guillem Jover <guillem@hadrons.org> | 2017-06-05 05:52:07 +0200 |
| commit | 368af99f554ca1c7211faf9eedfffcf45e5e76bb (patch) | |
| tree | 5d078d4907911b09a53b509d0714d055f373996c /configure.ac | |
| parent | 337e62027503aa6e09ca7adbe94cd7077f3241c3 (diff) | |
Fix the __progname check to avoid the optimizer discarding the symbol
Because we were assigning to another unused variable, when building the
check with optimizations enabled, which is the default when using gcc
as the compiler, the variable was being discarded. Instead pass it to
printf() so that it cannot do so.
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/configure.ac b/configure.ac index 5a432d4..5cbc2fa 100644 --- a/configure.ac +++ b/configure.ac @@ -131,9 +131,8 @@ AC_LINK_IFELSE( AC_MSG_CHECKING([for __progname]) AC_LINK_IFELSE( - [AC_LANG_PROGRAM([[]], - [[extern char *__progname; - const char *p = __progname;]])], + [AC_LANG_PROGRAM([[extern char *__progname;]], + [[printf("%s", __progname);]])], [AC_DEFINE([HAVE___PROGNAME], [1], [Define to 1 if you have __progname]) AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no])]) |