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Re: configure: error: unable to detect exception model

Josef Zlomek <> writes:

>> > configure:3662: /tmp/zlomj9am/gcc/gcc/xgcc -B/tmp/zlomj9am/gcc/gcc/ -nostdinc++  -L/tmp/zlomj9am/gcc/i686-pc-linux-gnu/libstdc++-v3/srcxgcc: conftest.C: C++ compiler not installed on this system
>> > configure: failed program was:
>> > #line 3655 "configure"
>> > #include "confdefs.h"
>> > #include <stdlib.h>
>> > int main() {
>> > char* tmp; strtoull("gnu", &tmp, 10);
>> > ; return 0; }
>> > configure:3690: checking for c header strategy to use
>> > configure:3747: checking for thread model used by GCC
>> > configure:3800: checking for exception model to use
>> > configure:3826: /tmp/zlomj9am/gcc/gcc/xgcc -B/tmp/zlomj9am/gcc/gcc/ -nostdinc++  -L/tmp/zlomj9am/gcc/i686-pc-linux-gnu/libstdc++-v3/srcxgcc: conftest.C: C++ compiler not installed on this system
>> >
>> > But g++ IS installed on the system.
>> Which commands did you issue exactly?
> I got the CVS version.
> Then "./configure" in the main dir - OK
> Then "make" - it made gcc, then started configuring something else and wrote the error

That's not how you should build GCC (according to  Use a separate build directory and
issue make bootstrap.  For example I run from a separate build dir
(most options are not needed and you can use the default):

/cvs/gcc/configure --prefix=/opt/gcc-3.1-devel --enable-shared \
	 --enable-threads=posix  --enable-clocale=gnu  \
         --with-gnu-as --with-gnu-ld --disable-nls --with-system-zlib
(make  bootstrap && make -k check) 2>&1|tee make-out

 Andreas Jaeger
  SuSE Labs

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