http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48621
Summary: Can't install gcc because Ada doctool installation
process uses wrong gcc, thus producing incompatible
ALI file
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: minor
Priority: P3
Component: ada
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: bauh...@futureapps.de
When running
# make install
after running
$ make check (successfully),
the installation process stops, and importantly,
before having installed /usr/local/bin/gcc,
at:
make[3]: Entering directory `/opt/build/gcc'
mkdir -p ada/doctools
cp -p ../../src/gcc/ada/xgnatugn.adb ada/doctools
cd ada/doctools && gnatmake -q xgnatugn
gnatmake: "xgnatugn.ali" incompatible ALI file, please recompile
gnatmake: "xgnatugn.adb" compilation error
Indeed,
$ head -1 xgnatugn.ali
will show GNAT Lib v4.4, not v4.6.
My guess is that the above step is effectively assuming that
a compatible (new) gcc is called, in effect the one /usr/bin---but
the new gcc isn't installed until the installation of gcc has succeeded
(into /usr/local). The gcc/xgcc does not seem to be used, either.
Catch 22.
A workaround seems to be to
# make -k install # after which -e /usr/local/bin/gcc
# rm gcc/ada/doctools/xgnatugn.ali
# make install
Hints:
# make -n gcc/ada/doctools/xgnatugn
gcc gcc/ada/doctools/xgnatugn.o -o gcc/ada/doctools/xgnatugn
# CC=gcc/xgcc make -e -n gcc/ada/doctools/xgnatugn
gcc/xgcc gcc/ada/doctools/xgnatugn.o -o gcc/ada/doctools/xgnatugn
# cd gcc
# CC=./xgcc make -e -n ada/doctools/xgnatugn
mkdir -p ada/doctools
cp -p ../../src/gcc/ada/xgnatugn.adb ada/doctools
cd ada/doctools && gnatmake -q xgnatugn
I saw CC = cc ; COMPILER = $(CC) in ada/Makefile.
Is GNAT's make process such that is assumes a
compatible GNAT already installed when compiling
ada/doctools/xgnatugn?
After installation as per the workaround above,
$ /usr/local/bin/gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/i686-pc-linux-gnu/4.7.0/lto-wrapper
Target: i686-pc-linux-gnu
Configured with: ../src/configure --enable-languages=c,ada --disable-nls
Thread model: posix
gcc version 4.7.0 20110411 (experimental) (GCC)
