bootstrap: warn about BSD toolchain snafu

[gnulib.git] / build-aux / bootstrap

diff --git a/build-aux/bootstrap b/build-aux/bootstrap
index cc7fc1b..5acbe5b 100755 (executable)
--- a/build-aux/bootstrap
+++ b/build-aux/bootstrap
@@ -1,6 +1,6 @@
 #! /bin/sh
 # Print a version string.
-scriptversion=2013-08-15.22; # UTC
+scriptversion=2013-12-05.23; # UTC
 
 # Bootstrap this package from checked-out sources.
 
@@ -209,12 +209,16 @@ bootstrap_sync=false
 # Use git to update gnulib sources
 use_git=true
 
+check_exists() {
+  ($1 --version </dev/null) >/dev/null 2>&1
+  test $? -lt 126
+}
+
 # find_tool ENVVAR NAMES...
 # -------------------------
 # Search for a required program.  Use the value of ENVVAR, if set,
-# otherwise find the first of the NAMES that can be run (i.e.,
-# supports --version).  If found, set ENVVAR to the program name,
-# die otherwise.
+# otherwise find the first of the NAMES that can be run.
+# If found, set ENVVAR to the program name, die otherwise.
 #
 # FIXME: code duplication, see also gnu-web-doc-update.
 find_tool ()
@@ -225,7 +229,7 @@ find_tool ()
   eval "find_tool_res=\$$find_tool_envvar"
   if test x"$find_tool_res" = x; then
     for i; do
-      if ($i --version </dev/null) >/dev/null 2>&1; then
+      if check_exists $i; then
         find_tool_res=$i
         break
       fi
@@ -463,8 +467,7 @@ check_versions() {
     if [ "$req_ver" = "-" ]; then
       # Merely require app to exist; not all prereq apps are well-behaved
       # so we have to rely on $? rather than get_version.
-      $app --version >/dev/null 2>&1 </dev/null
-      if [ 126 -le $? ]; then
+      if ! check_exists $app; then
         warn_ "Error: '$app' not found"
         ret=1
       fi
@@ -548,13 +551,21 @@ if ! printf "$buildreq" | check_versions; then
   fi
 fi
 
+# Warn the user if autom4te appears to be broken; this causes known
+# issues with at least gettext 0.18.3.
+probe=$(echo 'm4_quote([hi])' | autom4te -l M4sugar -t 'm4_quote:$%' -)
+if test "x$probe" != xhi; then
+  warn_ "WARNING: your autom4te wrapper eats stdin;"
+  warn_ "if bootstrap fails, consider upgrading your autotools"
+fi
+
 echo "$0: Bootstrapping from checked-out $package sources..."
 
 # See if we can use gnulib's git-merge-changelog merge driver.
-if $use_git && test -d .git && (git --version) >/dev/null 2>/dev/null ; then
+if $use_git && test -d .git && check_exists git; then
   if git config merge.merge-changelog.driver >/dev/null ; then
     :
-  elif (git-merge-changelog --version) >/dev/null 2>/dev/null ; then
+  elif check_exists git-merge-changelog; then
     echo "$0: initializing git-merge-changelog driver"
     git config merge.merge-changelog.name 'GNU-style ChangeLog merge driver'
     git config merge.merge-changelog.driver 'git-merge-changelog %O %A %B'