update build deps

[debian/gzip] / m4 / asm-underscore.m4

diff --git a/m4/asm-underscore.m4 b/m4/asm-underscore.m4
index 478aa03ee69bae4ac3568d8050feef6e078e8690..cc92534f0385e919a8542a4db4340539462c5315 100644 (file)
--- a/m4/asm-underscore.m4
+++ b/m4/asm-underscore.m4
@@ -1,5 +1,5 @@
-# asm-underscore.m4 serial 2
-dnl Copyright (C) 2010-2012 Free Software Foundation, Inc.
+# asm-underscore.m4 serial 3
+dnl Copyright (C) 2010-2018 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.
@@ -29,7 +29,7 @@ int foo(void) { return 0; }
 EOF
      # Look for the assembly language name in the .s file.
      AC_TRY_COMMAND(${CC-cc} $CFLAGS $CPPFLAGS $gl_c_asm_opt conftest.c) >/dev/null 2>&1
-     if grep _foo conftest.$gl_asmext >/dev/null ; then
+     if LC_ALL=C grep -E '(^|[[^a-zA-Z0-9_]])_foo([[^a-zA-Z0-9_]]|$)' conftest.$gl_asmext >/dev/null; then
        gl_cv_prog_as_underscore=yes
      else
        gl_cv_prog_as_underscore=no