configure scripts under <LLVM_ROOT>/projects do not substitute abs_top_srcdir properly

[llvmbot]

Bugzilla Link	442
Resolution	FIXED
Resolved on	Feb 22, 2010 12:55
Version	trunk
OS	Linux
Reporter	LLVM Bugzilla Contributor

Extended Description

under projects/sample:

BUILD_SRC_ROOT := $(subst //,/,@abs_top_srcdir@)

is rewritten to:

BUILD_SRC_ROOT :=
$(subst //,/,/home/alkis/projects/college/llvm/projects/sample)

but under projects/Java:

BUILD_SRC_ROOT := $(subst //,/,@abs_top_srcdir@)

is rewritten to:

BUILD_SRC_ROOT := $(subst //,/,.)

[llvmbot]

The problem was the Java/autoconf/configure.ac script. The removal of [ and ]
from varoius places caused the problem. [ and ] in m4 are used to quote things
like " pairs do in shell scripts. However, its even more important in m4 because
the content of configure.ac can be interpreted in so many places: at autoconf
time, during run of configure script, during run of config.stat, by the
compiler, etc.

Anyway, patch is here:

http://mail.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20040920/018466.html