diff options
Diffstat (limited to 'configure.in')
| -rw-r--r-- | configure.in | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/configure.in b/configure.in index 617fbe6a690..790ecec8f4e 100644 --- a/configure.in +++ b/configure.in @@ -1369,7 +1369,13 @@ AC_FUNC_ALLOCA # fmod, logb, and frexp are found in -lm on most systems. # On HPUX 9.01, -lm does not contain logb, so check for sqrt. -AC_CHECK_LIB(m, sqrt(0.0) + t) +old_CC="$CC" +# GCC's implicit prototype for its built-in `sqrt' function conflicts +# with autoconf's call, so disable the built-in function. +test x$GCC = xyes && CC="$CC -fno-builtin" +AC_CHECK_LIB(m, sqrt) +CC="$old_CC" + AC_CHECK_FUNCS(gettimeofday gethostname dup2 rename closedir mkdir rmdir \ random lrand48 bcopy bcmp logb frexp fmod ftime res_init setsid \ strerror fpathconf select mktime eaccess getpagesize tzset) |