The configure script tests for these executables, but we happily
proceed even if they are not found. For the m4 executable we got
the check right, however. Introduce a general helper that calls
AC_PATH_PROG() to locate an executable and aborts if it is not found.
AC_SUBST($1_cppflags)
AC_SUBST($1_ldflags)
])
AC_SUBST($1_cppflags)
AC_SUBST($1_ldflags)
])
+AC_DEFUN([REQUIRE_EXECUTABLE], [
+ AC_PATH_PROG(m4_toupper([$1]), [$1])
+ test -z "$m4_toupper([$1])" && AC_MSG_ERROR(
+ [$1 is required to build this package])
+])
AC_USE_SYSTEM_EXTENSIONS
AC_C_BIGENDIAN()
AC_USE_SYSTEM_EXTENSIONS
AC_C_BIGENDIAN()
-
-AC_PATH_PROG([BISON], [bison])
-AC_PATH_PROG([FLEX], [flex])
-
-AC_PATH_PROG([M4], [m4])
-test -z "$M4" && AC_MSG_ERROR(
- [The m4 macro processor is required to build this package])
-
+REQUIRE_EXECUTABLE([bison])
+REQUIRE_EXECUTABLE([flex])
+REQUIRE_EXECUTABLE([m4])
+
executables="recv filter audioc write afh play"
########################################################################### osl
STASH_FLAGS
executables="recv filter audioc write afh play"
########################################################################### osl
STASH_FLAGS