Add shave so that we can see the steaming piles of warnings generated.

The old style output can be reenabled for build system debugging using
"make V=1", or --disable-shave at configure time.

1 files changed, 73 insertions, 0 deletions

diff --git a/m4/shave.m4 b/m4/shave.m4
new file mode 100644
index 000000000..0c2c9f5a0
--- /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)
+])
+