diff options
Diffstat (limited to 'm4/ctng_gperf.m4')
| -rw-r--r-- | m4/ctng_gperf.m4 | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/m4/ctng_gperf.m4 b/m4/ctng_gperf.m4 new file mode 100644 index 00000000..0ec1a0ef --- /dev/null +++ b/m4/ctng_gperf.m4 @@ -0,0 +1,23 @@ +# Check for GNU perf location and the type it uses in the prototypes +# FIXME: remove AC_SUBST after switching to using autoheader +AC_DEFUN([CTNG_PROG_GPERF], + [AX_REQUIRE_DEFINED([CTNG_CHECK_TOOL_REQ]) + CTNG_CHECK_TOOL_REQ([GPERF], [gperf], [gperf]) + # Gperf 3.1 started generating functions with size_t rather than unsigned int + AC_MSG_CHECKING([for the type used in gperf declarations]) + cat > conftest.gperf.c <<_ASEOF +#include <string.h>" +const char * in_word_set(const char *, GPERF_LEN_TYPE); +_ASEOF + echo foo,bar | ${GPERF} -L ANSI-C >> conftest.gperf.c + AS_IF([${CC} -c -o /dev/null conftest.gperf.c -DGPERF_LEN_TYPE='size_t' >/dev/null 2>&1], + [AC_MSG_RESULT([size_t]) + GPERF_LEN_TYPE='size_t'], + [${CC} -c -o /dev/null conftest.gperf.c -DGPERF_LEN_TYPE='unsigned int' >/dev/null 2>&1], + [AC_MSG_RESULT([unsigned int]) + GPERF_LEN_TYPE='unsigned int'], + [AC_MSG_ERROR([unable to determine gperf len type])]) + rm -f conftest.gperf.c + AC_DEFINE_UNQUOTED([GPERF_LEN_TYPE], $GPERF_LEN_TYPE, [String length type used by gperf]) + AC_SUBST([GPERF_LEN_TYPE]) +]) |