David,
Some would say that it is a feature of the current build system that
random environment variables don't get used :-) It makes it that much
harder to get a predictable build.
-- Jon
David Herron wrote:
I was thinking about this issue of compiling with different gcc's and
it seems the normal way to install multiple gcc's is to use suffixes
for the version like so:-
gcc-4.1 == gcc v4.1.x
gcc-3.4 == gcc v3.4.x
gcc == gcc v4.2.x
I groped around the OpenJDK makefiles and found
jdk/make/common/shared/Compiler-gcc.gmk
corba/make/common/shared/Compiler-gcc.gmk
hotspot/build/linux/makefiles/gcc.make
both contain lines which say
CC=gcc
CPP=g++
According to the GNU make manual ..
http://www.gnu.org/software/make/manual/html_node/Setting.html#Setting
.. these values could be overridden with a small change in the makefile
CC?=gcc
CPP?=g++
And then setting CC or CPP in the environment would make it so the
variable is already set and these lines in the makefile would have no
effect.
- David Herron
