diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/configure.ac b/configure.ac index e3aae27..32b3979 100644 --- a/configure.ac +++ b/configure.ac @@ -81,8 +81,21 @@ AX_APPEND_COMPILE_FLAGS(["-fvisibility=hidden"]) # Motorola and SPARC CPUs), define `WORDS_BIGENDIAN'. AC_C_BIGENDIAN -# Check for functions that some compilers lack (or name differently) -AC_CHECK_FUNCS([gmtime_r _gmtime64_s]) +# Check for threadsafe variants of gmtime +# Note: check for gmtime_s is a bit more complex as it is implemented as a macro +AC_CHECK_FUNCS(gmtime_r, [], [ + AC_MSG_CHECKING([for gmtime_s]) + AC_LINK_IFELSE([ + AC_LANG_PROGRAM([[#include <time.h>]], [[ + time_t t; + struct tm m; + gmtime_s(&m, &t); + return 0; + ]])], + [AC_MSG_RESULT([yes]) + AC_DEFINE([HAVE_GMTIME_S], [1], [gmtime_s can be used])], + [AC_MSG_RESULT([no])] + )]) # Point to JPEG installed in DIR or disable JPEG with --without-jpeg. AC_ARG_WITH(jpeg, |