New compiler specification framework, based on mk/compiler.mk. The

changes from the old compiler.mk are:

  * Split apart the compiler-specific logic into separate files.  This
    should make supporting other compilers a bit easier.

  * Deprecate all of the USE_* compiler.mk variables, e.g. USE_GCC[23],
    USE_SUNPRO, etc.  It's all replaced with a new PKGSRC_COMPILER
    variable.

  * Clean up the GCC handling so that it's all controlled by a single
    variable GCC_REQD.  The following behaviour is expected:

    (a) If USE_PKGSRC_GCC is defined, then pretend there is no GCC on
        the system.
    (b) If there is no GCC, then the appropriate GCC corresponding to
        GCC_REQD is installed and used.
    (c) If there is a GCC, if it satisfies GCC_REQD, then use it;
        otherwise install and use the appropriate GCC package.
    (d) If lang/gcc is installed and GCC_REQD > 2.95.3, then lang/gcc3
        is installed and used.
    (e) If lang/gcc3 is installed and GCC_REQD = 2.95.3, then gcc3 is
        still used instead of installing lang/gcc.

New features include:

  * PKGSRC_COMPILER takes a list of values specifying the chain of
    compilers to call when building packages.  Valid values are:

	distcc          distributed C/C++ (chainable)
	ccache          compiler cache (chainable)
	gcc             GNU
	mipspro         Silicon Graphics, Inc. MIPSpro
	sunpro          Sun Microsystems, Inc. WorkShip/Forte/Sun
			ONE Studio

    The default is "gcc".  You can use ccache and/or distcc with an
    appropriate PKGSRC_COMPILER setting, e.g. "ccache distcc gcc".

  * Change GCC_REQD to hold a list of values that we scan through to
    find the highest version of GCC required by the build.  Package
    Makefiles should now do "GCC_REQD+=..." instead of "GCC_REQD=...".

1 files changed, 45 insertions, 0 deletions

diff --git a/mk/compiler/ccache.mk b/mk/compiler/ccache.mk
new file mode 100644
index 00000000000..b1b0fae7353
--- /dev/null
+++ b/mk/compiler/ccache.mk
@@ -0,0 +1,45 @@
+# $NetBSD: ccache.mk,v 1.1 2004/02/01 00:31:00 jlam Exp $
+
+.if !defined(COMPILER_CCACHE_MK)
+COMPILER_CCACHE_MK=	defined
+
+.if !empty(PKGPATH:Mdevel/ccache)
+IGNORE_CCACHE=	yes
+MAKEFLAGS+=	IGNORE_CCACHE=yes
+.endif
+
+.if defined(IGNORE_CCACHE)
+_USE_CCACHE=	NO
+.endif
+
+.if !defined(_USE_CCACHE)
+_USE_CCACHE=	YES
+.endif
+
+.if !empty(_USE_CCACHE:M[yY][eE][sS])
+#
+# Add the dependency on ccache.
+BUILD_DEPENDS+=	ccache-[0-9]*:../../devel/ccache
+.endif
+
+EVAL_PREFIX+=	_CCACHEBASE=ccache
+_CCACHEBASE_DEFAULT=	${LOCALBASE}
+_CCACHEBASE?=		${LOCALBASE}
+
+.if exists(${_CCACHEBASE}/bin/ccache)
+_CCACHE_DIR=	${WRKDIR}/.ccache
+PATH:=		${_CCACHE_DIR}/bin:${PATH}
+
+CC=		${_CCACHE_DIR}/bin/cc
+CXX=		${_CCACHE_DIR}/bin/c++
+
+.  for _target_ in CC CXX
+override-tools: ${${_target_}}
+${${_target_}}:
+	${_PKG_SILENT}${_PKG_DEBUG}${MKDIR} ${.TARGET:H}
+	${_PKG_SILENT}${_PKG_DEBUG}					\
+	${LN} -fs ${_CCACHEBASE}/bin/ccache ${.TARGET}
+.  endfor
+.endif
+
+.endif	# COMPILER_CCACHE_MK