execinfo: new module

[gnulib.git] / m4 / execinfo.m4

diff --git a/m4/execinfo.m4 b/m4/execinfo.m4
new file mode 100644 (file)
index 0000000..fa2b845
--- /dev/null
+++ b/m4/execinfo.m4
@@ -0,0 +1,21 @@
+# Check for GNU-style execinfo.h.
+
+dnl Copyright 2012 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_EXECINFO_H],
+[
+  AC_CHECK_HEADERS_ONCE([execinfo.h])
+
+  if test $ac_cv_header_execinfo_h = yes; then
+    EXECINFO_H=''
+  else
+    EXECINFO_H='execinfo.h'
+    AC_LIBOBJ([execinfo])
+  fi
+
+  AC_SUBST([EXECINFO_H])
+  AM_CONDITIONAL([GL_GENERATE_EXECINFO_H], [test -n "$EXECINFO_H"])
+])