1 files changed, 59 insertions, 0 deletions
diff --git a/libsigsegv/m4/bold.m4 b/libsigsegv/m4/bold.m4
new file mode 100644
index 00000000..5f5420ec
--- /dev/null
+++ b/libsigsegv/m4/bold.m4
@@ -0,0 +1,59 @@
+# bold.m4 serial 1 (libsigsegv-2.0)
+dnl Copyright (C) 1999-2002 Ralf S. Engelschall <rse@engelschall.com>
+dnl Copyright (C) 2002 Bruno Haible <bruno@clisp.org>
+dnl This file is free software, distributed under the terms of the GNU
+dnl General Public License.  As a special exception to the GNU General
+dnl Public License, this file may be distributed as part of a program
+dnl that contains a configuration script generated by Autoconf, under
+dnl the same distribution terms as the rest of that program.
+
+# Determine the escape sequences for switching bold output on and off.
+AC_DEFUN([RSE_BOLD],
+[
+  dnl Not pretty.
+  dnl AC_REQUIRE([AC_PROG_AWK])
+
+  case $TERM in
+    # for the most important terminal types we directly know the sequences
+    xterm*|vt220*)
+      term_bold=`${AWK:-awk} 'BEGIN { printf("%c%c%c%c", 27, 91, 49, 109); }' </dev/null 2>/dev/null`
+      term_norm=`${AWK:-awk} 'BEGIN { printf("%c%c%c", 27, 91, 109); }' </dev/null 2>/dev/null`
+      ;;
+    vt100*)
+      term_bold=`${AWK:-awk} 'BEGIN { printf("%c%c%c%c%c%c", 27, 91, 49, 109, 0, 0); }' </dev/null 2>/dev/null`
+      term_norm=`${AWK:-awk} 'BEGIN { printf("%c%c%c%c%c", 27, 91, 109, 0, 0); }' </dev/null 2>/dev/null`
+      ;;
+    # for all others, we try to use a possibly existing `tput' or `tcout' utility
+    *)
+      paths=`echo "$PATH" | sed -e 's/:/ /g'`
+      for tool in tput tcout; do
+        for dir in $paths; do
+          if test -r "$dir/$tool"; then
+            for seq in bold md smso; do # 'smso' is last
+              bold="`$dir/$tool $seq 2>/dev/null`"
+              if test -n "$bold"; then
+                term_bold="$bold"
+                break
+              fi
+            done
+            if test -n "$term_bold"; then
+              for seq in sgr0 me rmso reset; do # 'reset' is last
+                norm="`$dir/$tool $seq 2>/dev/null`"
+                if test -n "$norm"; then
+                  term_norm="$norm"
+                  break
+                fi
+              done
+            fi
+            break
+          fi
+        done
+        if test -n "$term_bold" && test -n "$term_norm"; then
+          break
+        fi
+      done
+      ;;
+  esac
+  echo "$term_bold" | tr -d '\n' > termbold
+  echo "$term_norm" | tr -d '\n' > termnorm
+])