Add shave support, enabled by default.

This cuts down build system noise so that warnings are more visible.  The
old style output can be reenabled for build system debugging using
"make V=1", or --disable-shave at configure time.

5 files changed, 227 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
index 2198dd93..0479eb8b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -24,6 +24,8 @@ install-sh
 libtool
 ltmain.sh
 missing
+shave
+shave-libtool
 stamp-h1
 i810.4
 intel.4
diff --git a/configure.ac b/configure.ac
index 3f6f1b82..88059bfa 100644
--- a/configure.ac
+++ b/configure.ac
@@ -34,6 +34,11 @@ AM_INIT_AUTOMAKE([dist-bzip2])
 
 AM_MAINTAINER_MODE
 
+AC_CONFIG_FILES([
+	shave
+	shave-libtool
+])
+
 # Checks for programs.
 AC_DISABLE_STATIC
 AC_PROG_LIBTOOL
@@ -259,6 +264,8 @@ XORG_RELEASE_VERSION
 
 XORG_CHECK_LINUXDOC
 
+SHAVE_INIT([.], [enable])
+
 AC_OUTPUT([
 	Makefile
 	uxa/Makefile
diff --git a/m4/shave.m4 b/m4/shave.m4
new file mode 100644
index 00000000..0c2c9f5a
--- /dev/null
+++ b/m4/shave.m4
@@ -0,0 +1,73 @@
+dnl Make automake/libtool output more friendly to humans
+dnl
+dnl SHAVE_INIT([shavedir],[default_mode])
+dnl
+dnl shavedir: the directory where the shave scripts are, it defaults to
+dnl           $(top_builddir)
+dnl default_mode: (enable|disable) default shave mode.  This parameter
+dnl               controls shave's behaviour when no option has been
+dnl               given to configure.  It defaults to disable.
+dnl
+dnl * SHAVE_INIT should be called late in your configure.(ac|in) file (just
+dnl   before AC_CONFIG_FILE/AC_OUTPUT is perfect.  This macro rewrites CC and
+dnl   LIBTOOL, you don't want the configure tests to have these variables
+dnl   re-defined.
+dnl * This macro requires GNU make's -s option.
+
+AC_DEFUN([_SHAVE_ARG_ENABLE],
+[
+  AC_ARG_ENABLE([shave],
+    AS_HELP_STRING(
+      [--enable-shave],
+      [use shave to make the build pretty [[default=$1]]]),,
+      [enable_shave=$1]
+    )
+])
+
+AC_DEFUN([SHAVE_INIT],
+[
+  dnl you can tweak the default value of enable_shave
+  m4_if([$2], [enable], [_SHAVE_ARG_ENABLE(yes)], [_SHAVE_ARG_ENABLE(no)])
+
+  if test x"$enable_shave" = xyes; then
+    dnl where can we find the shave scripts?
+    m4_if([$1],,
+      [shavedir="$ac_pwd"],
+      [shavedir="$ac_pwd/$1"])
+    AC_SUBST(shavedir)
+
+    dnl make is now quiet
+    AC_SUBST([MAKEFLAGS], [-s])
+    AC_SUBST([AM_MAKEFLAGS], ['`test -z $V && echo -s`'])
+
+    dnl we need sed
+    AC_CHECK_PROG(SED,sed,sed,false)
+
+    dnl substitute libtool
+    SHAVE_SAVED_LIBTOOL=$LIBTOOL
+    LIBTOOL="${SHELL} ${shavedir}/shave-libtool '${SHAVE_SAVED_LIBTOOL}'"
+    AC_SUBST(LIBTOOL)
+
+    dnl substitute cc/cxx
+    SHAVE_SAVED_CC=$CC
+    SHAVE_SAVED_CXX=$CXX
+    SHAVE_SAVED_FC=$FC
+    SHAVE_SAVED_F77=$F77
+    CC="${SHELL} ${shavedir}/shave cc ${SHAVE_SAVED_CC}"
+    CXX="${SHELL} ${shavedir}/shave cxx ${SHAVE_SAVED_CXX}"
+    FC="${SHELL} ${shavedir}/shave fc ${SHAVE_SAVED_FC}"
+    F77="${SHELL} ${shavedir}/shave f77 ${SHAVE_SAVED_F77}"
+    AC_SUBST(CC)
+    AC_SUBST(CXX)
+    AC_SUBST(FC)
+    AC_SUBST(F77)
+
+    V=@
+  else
+    V=1
+  fi
+  Q='$(V:1=)'
+  AC_SUBST(V)
+  AC_SUBST(Q)
+])
+
diff --git a/shave-libtool.in b/shave-libtool.in
new file mode 100644
index 00000000..1f3a720c
--- /dev/null
+++ b/shave-libtool.in
@@ -0,0 +1,69 @@
+#!/bin/sh
+
+# we need sed
+SED=@SED@
+if test -z "$SED" ; then
+SED=sed
+fi
+
+lt_unmangle ()
+{
+   last_result=`echo $1 | $SED -e 's#.libs/##' -e 's#[0-9a-zA-Z_\-\.]*_la-##'`
+}
+
+# the real libtool to use
+LIBTOOL="$1"
+shift
+
+# if 1, don't print anything, the underlaying wrapper will do it
+pass_though=0
+
+# scan the arguments, keep the right ones for libtool, and discover the mode
+preserved_args=
+while test "$#" -gt 0; do
+    opt="$1"
+    shift
+
+    case $opt in
+    --mode=*)
+        mode=`echo $opt | $SED -e 's/[-_a-zA-Z0-9]*=//'`
+        preserved_args="$preserved_args $opt"
+        ;;
+    -o)
+        lt_output="$1"
+        preserved_args="$preserved_args $opt"
+	;;
+    *)
+        preserved_args="$preserved_args $opt"
+        ;;
+      esac
+done
+
+case "$mode" in
+compile)
+    # shave will be called and print the actual CC/CXX/LINK line
+    preserved_args="$preserved_args --shave-mode=$mode"
+    pass_though=1
+    ;;
+link)
+    preserved_args="$preserved_args --shave-mode=$mode"
+    Q="  LINK  "
+    ;;
+*)
+    # let's u
+    # echo "*** libtool: Unimplemented mode: $mode, fill a bug report"
+    ;;
+esac
+
+lt_unmangle "$lt_output"
+output=$last_result
+
+if test -z $V; then
+    if test $pass_though -eq 0; then
+        echo "$Q$output"
+    fi
+    $LIBTOOL --silent $preserved_args
+else
+    echo $LIBTOOL $preserved_args
+    $LIBTOOL $preserved_args
+fi
diff --git a/shave.in b/shave.in
new file mode 100644
index 00000000..174641e9
--- /dev/null
+++ b/shave.in
@@ -0,0 +1,76 @@
+#!/bin/sh
+
+# we need sed
+SED=@SED@
+if test -z "$SED" ; then
+SED=sed
+fi
+
+lt_unmangle ()
+{
+   last_result=`echo $1 | $SED -e 's#.libs/##' -e 's#[0-9a-zA-Z_\-\.]*_la-##'`
+}
+
+# the tool to wrap (cc, cxx, ar, ranlib, ..)
+tool="$1"
+shift
+
+# the reel tool (to call)
+REEL_TOOL="$1"
+shift
+
+pass_through=0
+preserved_args=
+while test "$#" -gt 0; do
+    opt="$1"
+    shift
+
+    case $opt in
+    --shave-mode=*)
+        mode=`echo $opt | $SED -e 's/[-_a-zA-Z0-9]*=//'`
+	;;
+    -o)
+        lt_output="$1"
+        preserved_args="$preserved_args $opt"
+	;;
+    *)
+        preserved_args="$preserved_args $opt"
+        ;;
+      esac
+done
+
+# mode=link is handled in the libtool wrapper
+case "$mode,$tool" in
+link,*)
+    pass_through=1
+    ;;
+*,cxx)
+    Q="  CXX   "
+    ;;
+*,cc)
+    Q="  CC    "
+    ;;
+*,fc)
+    Q="  FC    "
+    ;;
+*,f77)
+    Q="  F77   "
+    ;;
+*,*)
+    # should not happen
+    Q="  CC    "
+    ;;
+esac
+
+lt_unmangle "$lt_output"
+output=$last_result
+
+if test -z $V; then
+    if test $pass_through -eq 0; then
+        echo "$Q$output"
+    fi
+    $REEL_TOOL $preserved_args
+else
+    echo $REEL_TOOL $preserved_args
+    $REEL_TOOL $preserved_args
+fi