configure.ac, base/asm-common.h: Check explicitly for `_' on symbols.

There's an autoconf macro for this in the Debian `libltdl-dev' package,
though not in the main `libtool' package.

I think some BSDs are foolish enough to put `_' on symbols even though
they notionally use ELF.  This may not be enough to make things work on
them, but it should at least help a bit.

diff --git a/base/asm-common.h b/base/asm-common.h
index e8f6445..44c223d 100644 (file)
--- a/base/asm-common.h
+++ b/base/asm-common.h
@@ -1116,7 +1116,11 @@ name:
 #endif
 
 #ifndef F
-#  define F(name) name
+#  ifdef SYM_USCORE
+#    define F(name) _##name
+#  else
+#    define F(name) name
+#  endif
 #endif
 
 #ifndef TYPE_FUNC

diff --git a/configure.ac b/configure.ac
index 308e457..cc7f3b4 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -192,6 +192,13 @@ case mdw_asm_debug in
        [Define to enable assembler-level debugging.]) ;;
 esac
 
+dnl Check for leading underscores on C symbols.
+LT_SYS_SYMBOL_USCORE
+case $sys_symbol_underscore in
+  yes) AC_DEFINE([SYM_USCORE], [1],
+        [Define if C symbols are prefixed with an underscore.]) ;;
+esac
+
 dnl--------------------------------------------------------------------------
 dnl CPU-specific assembler features.