@@ -3,13 +3,32 @@ host_options='--with-mpc=/opt/cfarm/mpc' # gcc10
TEST=all-gcc
# Make sure you have a recent enough gcc (with ada support) in your path so
# that --enable-werror-always will work.
-# To use, create a sibling directory to the gcc sources and cd into this.
+# To use, create a build directory with plenty of free disk space - a build of
+# all configurations can take 450GB.
+# By default, this file assumes the build directory is in a sibling directory
+# to the gcc sources, but you can override GCC_SRC_DIR to specify where to
+# find them. GCC_SRC_DIR is used in the directory below the build directory,
+# hence the two ".." in the default value; if overriding it, it's easiest to
+# supply an absolute path.
+GCC_SRC_DIR=../../gcc
+
# Use -j / -l make arguments and nice to assure a smooth resource-efficient
# load on the build machine, e.g. for 24 cores:
# svn co svn://gcc.gnu.org/svn/gcc/branches/foo-branch gcc
# mkdir multi-mk; cd multi-mk
# nohup nice make -j25 -l36 -f ../gcc/contrib/config-list.mk > make.out 2>&1 &
#
+# Alternatively, if building against an existing gcc source tree:
+#
+# cd /somewhere/with/plenty/of/disk/space
+# mkdir multi-mk; cd multi-mk
+# nohup nice make \
+# -j25 -l36 \
+# -f /path/to/contrib/config-list.mk \
+# GCC_SRC_DIR=/path/to/gcc/source/tree \
+# > make.out 2>&1 &
+#
+
# v850e1-elf is rejected by config.sub
FULL_LIST = aarch64-elf aarch64-linux-gnu aarch64-rtems \
alpha-linux-gnu alpha-freebsd6 alpha-netbsd alpha-openbsd \
@@ -99,17 +118,17 @@ show:
empty=
-#Check for the presence of the MAINTAINERS file to make sure we are in a
-#suitable current working directory.
-make-log-dir: ../gcc/MAINTAINERS
- mkdir log
+#Check for the presence of the MAINTAINERS file to make sure we've located
+#the gcc sources.
+make-log-dir: $(GCC_SRC_DIR)/MAINTAINERS
+ -mkdir log
$(LIST): make-log-dir
-mkdir $@
( \
cd $@ && \
TGT=`echo $@ | awk 'BEGIN { FS = "OPT" }; { print $$1 }'` && \
- TGT=`../../gcc/config.sub $$TGT` && \
+ TGT=`$(GCC_SRC_DIR)/config.sub $$TGT` && \
case $$TGT in \
*-*-darwin* | *-*-cygwin* | *-*-mingw* | *-*-aix*) \
ADDITIONAL_LANGUAGES=""; \
@@ -118,7 +137,7 @@ $(LIST): make-log-dir
ADDITIONAL_LANGUAGES=",go"; \
;; \
esac && \
- ../../gcc/configure \
+ $(GCC_SRC_DIR)/configure \
--target=$(subst SCRIPTS,`pwd`/../scripts/,$(subst OPT,$(empty) -,$@)) \
--enable-werror-always ${host_options} \
--enable-languages=all,ada$$ADDITIONAL_LANGUAGES; \
config-list.mk currently requires the pwd to be in a sibling directory of the source tree. However, building using config-list.mk can consume over 400GB of disk space in this build directory (e.g. my machine successfully built cc1 for 206 configurations last night, consuming 442GB of space). I've found it useful to be able to run config-list.mk in an arbitrary build location (i.e. one with plenty of free space), so this patch adds a GCC_SRC_DIR variable which can be overridden. contrib/ChangeLog: * config-list.mk (GCC_SRC_DIR): New variable. (make-log-dir): Use GCC_SRC_DIR. ($(LIST)): Likewise. --- contrib/config-list.mk | 33 ++++++++++++++++++++++++++------- 1 file changed, 26 insertions(+), 7 deletions(-)