Add meta/build-env

* meta/build-env.in: New file which sets up an environment that does not
  inherit GUILE_LOAD_PATH / GUILE_LOAD_COMPILED_PATH (unless
  cross-compiling).
* doc/ref/Makefile.am (autoconf-macros.texi):
* libguile/Makefile.am (snarf2checkedtexi):
* module/Makefile.am (ice-9/psyntax-pp.go):
* test-suite/standalone/Makefile.am (GUILE_INSTALL_LOCALE):
* am/bootstrap.am (.scm.go):
* am/guilec (.scm.go): Use build-env.
* configure.ac: Create build-env.

am/bootstrap.am

@@ -41,7 +41,7 @@ SUFFIXES = .scm .go
 
 .scm.go:
 	$(AM_V_GUILEC)GUILE_AUTO_COMPILE=0			\
-	$(top_builddir)/meta/uninstalled-env			\
+	$(top_builddir)/meta/build-env				\
 	guild compile --target="$(GUILE_TARGET)"                \
           $(GUILE_WARNINGS) $(GUILE_OPTIMIZATIONS)              \
 	  -L "$(abs_top_srcdir)/module"                         \

am/guilec

@@ -28,7 +28,7 @@ SUFFIXES = .scm .el .go
 
 .scm.go:
 	$(AM_V_GUILEC)GUILE_AUTO_COMPILE=0			\
-	$(top_builddir)/meta/uninstalled-env			\
+	$(top_builddir)/meta/build-env				\
 	guild compile --target="$(host)" $(GUILE_WARNINGS)	\
 	  -L "$(abs_srcdir)" -L "$(abs_builddir)"		\
 	  -L "$(abs_top_srcdir)/guile-readline"			\
@@ -36,7 +36,7 @@ SUFFIXES = .scm .el .go
 
 .el.go:
 	$(AM_V_GUILEC)GUILE_AUTO_COMPILE=0			\
-	$(top_builddir)/meta/uninstalled-env			\
+	$(top_builddir)/meta/build-env				\
 	guild compile --target="$(host)" $(GUILE_WARNINGS)	\
 	  -L "$(abs_srcdir)" -L "$(abs_builddir)"		\
 	  -L "$(abs_top_srcdir)/guile-readline"			\

configure.ac

@@ -1663,6 +1663,7 @@ AC_CONFIG_FILES([
 GUILE_CONFIG_SCRIPT([check-guile])
 GUILE_CONFIG_SCRIPT([benchmark-guile])
 GUILE_CONFIG_SCRIPT([meta/guile])
+GUILE_CONFIG_SCRIPT([meta/build-env])
 GUILE_CONFIG_SCRIPT([meta/uninstalled-env])
 GUILE_CONFIG_SCRIPT([meta/gdb-uninstalled-guile])
 GUILE_CONFIG_SCRIPT([libguile/guile-snarf])

doc/ref/Makefile.am

@@ -120,7 +120,7 @@ EXTRA_DIST = ChangeLog-2008 $(PICTURES)
 
 libguile-autoconf.texi: autoconf-macros.texi
 autoconf-macros.texi: $(top_srcdir)/meta/guile.m4
-	GUILE_AUTO_COMPILE=0 $(top_builddir)/meta/uninstalled-env guild \
+	GUILE_AUTO_COMPILE=0 $(top_builddir)/meta/build-env guild \
 	  snarf-guile-m4-docs $(top_srcdir)/meta/guile.m4 \
 	  > $(srcdir)/$@
 

libguile/Makefile.am

@@ -762,7 +762,7 @@ load.x: libpath.h
 dynl.x: libpath.h
 
 alldotdocfiles    = $(DOT_DOC_FILES) $(EXTRA_DOT_DOC_FILES)
-snarf2checkedtexi = GUILE_AUTO_COMPILE=0 $(top_builddir)/meta/uninstalled-env guild snarf-check-and-output-texi
+snarf2checkedtexi = GUILE_AUTO_COMPILE=0 $(top_builddir)/meta/build-env guild snarf-check-and-output-texi
 dotdoc2texi       = cat $(alldotdocfiles) | $(snarf2checkedtexi)
 
 guile.texi: $(alldotdocfiles) guile$(EXEEXT)

meta/build-env.in

@@ -0,0 +1,121 @@
+#!/bin/sh
+
+#	Copyright (C) 2003, 2006, 2008-2012, 2016 Free Software Foundation
+#
+#   This file is part of GNU Guile.
+#
+# This script is free software; you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as
+# published by the Free Software Foundation; either version 3 of the
+# License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+# 02110-1301 USA
+
+# Usage: build-env [ARGS]
+
+# This script arranges for the environment to support running Guile from
+# the build tree.  Unlike uninstalled-env, we clobber the environment so
+# as to avoid inheriting environment variables that could make Guile
+# load .scm, .go, or .so files from installed directories.
+
+# Example: build-env guile -c '(display "hello\n")'
+# Example: ../../build-env ./guile-test-foo
+
+top_srcdir="@top_srcdir_absolute@"
+top_builddir="@top_builddir_absolute@"
+
+[ x"$top_srcdir"   = x -o ! -d "$top_srcdir" -o \
+  x"$top_builddir" = x -o ! -d "$top_builddir" ] && {
+    echo $0: bad environment
+    echo top_srcdir=$top_srcdir
+    echo top_builddir=$top_builddir
+    exit 1
+}
+
+# When cross-compiling, let $GUILE_FOR_BUILD use its own .go files since
+# the ones that are being built may be incompatible ($GUILE_FOR_BUILD is
+# typically used to run `guild compile --target=$host'.)  Likewise,
+# $GUILE_FOR_BUILD must use its own source files when booting; for
+# instance, $srcdir/module/ice-9/boot-9.scm must not be in its search
+# path, because it would then end up using its C evaluator to run the
+# compiler.
+if test "@cross_compiling@" = "no"
+then
+    GUILE_LOAD_PATH="${top_srcdir}/module:${top_srcdir}/guile-readline"
+    if test "${top_srcdir}" != "${top_builddir}"; then
+        GUILE_LOAD_PATH="$GUILE_LOAD_PATH:${top_builddir}/module:${top_builddir}/guile-readline"
+    fi
+    export GUILE_LOAD_PATH
+    GUILE_LOAD_COMPILED_PATH="${top_builddir}/module:${top_builddir}/bootstrap:${top_builddir}/prebuilt/@host@:${top_builddir}/guile-readline"
+    export GUILE_LOAD_COMPILED_PATH
+
+    # Don't look in installed dirs for guile modules
+    if ( env | grep -v '^GUILE_SYSTEM_PATH=' > /dev/null ); then
+	GUILE_SYSTEM_PATH=
+	export GUILE_SYSTEM_PATH
+    fi
+    # Don't look in installed dirs for compiled guile modules
+    if ( env | grep -v '^GUILE_SYSTEM_COMPILED_PATH=' > /dev/null ); then
+	GUILE_SYSTEM_COMPILED_PATH=
+	export GUILE_SYSTEM_COMPILED_PATH
+    fi
+    # Don't look in installed dirs for dlopen-able modules
+    if ( env | grep -v '^GUILE_SYSTEM_EXTENSIONS_PATH=' > /dev/null ); then
+	GUILE_SYSTEM_EXTENSIONS_PATH=
+	export GUILE_SYSTEM_EXTENSIONS_PATH
+    fi
+fi
+
+# handle LTDL_LIBRARY_PATH (no clobber)
+for dir in guile-readline libguile ; do
+    if test -z "$LTDL_LIBRARY_PATH"; then
+      LTDL_LIBRARY_PATH="${top_builddir}/${dir}"
+    else
+      LTDL_LIBRARY_PATH="${top_builddir}/${dir}:${LTDL_LIBRARY_PATH}"
+    fi
+    if test -z "$DYLD_LIBRARY_PATH"; then
+      DYLD_LIBRARY_PATH="${top_builddir}/${dir}/.libs"
+    else
+      DYLD_LIBRARY_PATH="${top_builddir}/${dir}/.libs:${DYLD_LIBRARY_PATH}"
+    fi
+done
+export LTDL_LIBRARY_PATH
+export DYLD_LIBRARY_PATH
+
+if [ x"$PKG_CONFIG_PATH" = x ]
+then
+    PKG_CONFIG_PATH="${top_builddir}/meta"
+else
+    PKG_CONFIG_PATH="${top_builddir}/meta:$PKG_CONFIG_PATH"
+fi
+export PKG_CONFIG_PATH
+
+# handle PATH (no clobber)
+PATH="${top_builddir}/libguile:${PATH}"
+PATH="${top_srcdir}/meta:${PATH}"
+if test "x${top_srcdir}" != "x${top_builddir}"; then
+  PATH="${top_builddir}/meta:${PATH}"
+fi
+export PATH
+
+# Define $GUILE, used by `guild'.
+if test "@cross_compiling@" = "no"
+then
+  GUILE=${top_builddir}/libguile/guile@EXEEXT@
+else
+  GUILE="@GUILE_FOR_BUILD@"
+fi    
+export GUILE
+  
+XDG_CACHE_HOME=${top_builddir}/cache
+export XDG_CACHE_HOME
+
+exec "$@"

module/Makefile.am

@@ -36,7 +36,7 @@ $(nobase_ccache_DATA): ../bootstrap/ice-9/eval.go
 # Keep this rule in sync with that in `am/guilec'.
 ice-9/psyntax-pp.go: ice-9/psyntax.scm ice-9/psyntax-pp.scm
 	$(AM_V_GUILEC)GUILE_AUTO_COMPILE=0				\
-	$(top_builddir)/meta/uninstalled-env				\
+	$(top_builddir)/meta/build-env					\
 	guild compile --target="$(host)" $(GUILE_WARNINGS)		\
 	  -L "$(abs_srcdir)" -L "$(abs_builddir)"			\
 	  -L "$(abs_top_srcdir)/guile-readline"				\

test-suite/standalone/Makefile.am

@@ -35,7 +35,7 @@ TESTS_ENVIRONMENT =						\
   srcdir="$(srcdir)"						\
   builddir="$(builddir)"					\
   @LOCALCHARSET_TESTS_ENVIRONMENT@				\
-  GUILE_AUTO_COMPILE=0 "${top_builddir}/meta/uninstalled-env"
+  GUILE_AUTO_COMPILE=0 "${top_builddir}/meta/build-env"
 
 ## Check for headers in $(srcdir) and build dir before $(CPPFLAGS), which
 ## may point us to an old, installed version of guile.