configure: Detect type of length parameter for gperf generated function

Since 3.1 gperf uses size_t for the length parameter instead of an unsigned int.
2017-09-19 13:24:43 +02:00
parent d4593353c9
commit e0e4322973
4 changed files with 21 additions and 6 deletions
@@ -378,6 +378,21 @@ AC_PATH_PROG([GPERF], [gperf], [], [$PATH:/bin:/usr/bin:/usr/local/bin])
 AC_MSG_CHECKING([gperf version >= 3.0.0])
 if test -x "$GPERF"; then
 	if test "`$GPERF --version | $AWK -F' ' '/^GNU gperf/ { print $3 }' | $AWK -F. '{ print $1 }'`" -ge "3"; then
+		GPERF_OUTPUT="`echo foo | ${GPERF}`"
+		AC_COMPILE_IFELSE(
+			[AC_LANG_PROGRAM(
+				[[#include <string.h>
+				  const char *in_word_set(const char*, size_t); $GPERF_OUTPUT]])],
+			[GPERF_LEN_TYPE=size_t],
+			[AC_COMPILE_IFELSE(
+				[AC_LANG_PROGRAM(
+					[[#include <string.h>
+					  const char *in_word_set(const char*, unsigned); $GPERF_OUTPUT]])],
+				[GPERF_LEN_TYPE=unsigned],
+				[AC_MSG_ERROR([unable to determine gperf len type])]
+			)]
+		)
+		AC_DEFINE_UNQUOTED([GPERF_LEN_TYPE], [$GPERF_LEN_TYPE], [gperf len type])
 		AC_MSG_RESULT([yes])
 	else
 		AC_MSG_RESULT([no])