added checking whether system() can handle calls like

system("command `command2`")

diff --git a/aclocal.m4 b/aclocal.m4
index 66a1b30..7a8ab74 100644 (file)
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -44,3 +44,31 @@ exit 1
 fi
 ])
 
 fi
 ])
 

+AC_DEFUN(SWF_CHECK_SYSTEM_BACKTICKS,
+[
+AC_MSG_CHECKING([whether system() can handle command substitution])
+AC_TRY_RUN([
+#include "stdlib.h"
+int main (int argc, char*argv[])
+{
+    return system("echo `echo 0` > config.tmp2");
+}
+], OK=OK,,CROSSCOMPILE=1)
+
+if test "x${OK}" = "xOK";then
+    test -s config.tmp2 || OK=
+fi
+
+if test "x${CROSSCOMPILE}" = "x1";then
+    OK=OK;
+fi
+if test "x${OK}" = "xOK";then
+rm -f config.tmp2
+AC_MSG_RESULT(yes)
+export SYSTEM_BACKTICKS=1
+AC_DEFINE_UNQUOTED(SYSTEM_BACKTICKS, 1)
+else
+AC_MSG_RESULT(no)
+fi
+])
+

diff --git a/config.h.in b/config.h.in
index eb97601..ef46f24 100644 (file)
--- a/config.h.in
+++ b/config.h.in
@@ -142,4 +142,7 @@
 /* use gzip/uncompress */
 #undef USE_GZIP
 
 /* use gzip/uncompress */
 #undef USE_GZIP
 

+/* system() can handle command substitution */
+#undef SYSTEM_BACKTICKS
+

 #endif
 #endif

diff --git a/configure.in b/configure.in
index 438dc8b..61790a8 100644 (file)
--- a/configure.in
+++ b/configure.in
@@ -42,6 +42,8 @@ dnl Checks for libraries.
 
 SWF_CHECK_BYTEORDER
 AC_SUBST(WORDS_BIGENDIAN)
 
 SWF_CHECK_BYTEORDER
 AC_SUBST(WORDS_BIGENDIAN)

+SWF_CHECK_SYSTEM_BACKTICKS
+AC_SUBST(SYSTEM_BACKTICKS)

 
 AC_ARG_PROGRAM
 
 
 AC_ARG_PROGRAM