8.21.2. Contents of GMP
Installed libraries:
libgmp.so and libgmpxx.so
Installed directory:
/usr/share/doc/gmp-6.3.0
The GMP package contains math libraries. These have useful functions for arbitrary precision arithmetic.
Approximate build time:
0.3 SBU
Required disk space:
54 MB
8.21.1. Installation of GMP
![[Note]](../images/note.png)
Note
The default settings of GMP produce libraries optimized for the
host processor. If libraries suitable for processors less capable
than the host's CPU are desired, generic libraries can be created
by appending the --host=none-linux-gnu option to the configure command.
Prepare GMP for compilation:
./configure --prefix=/usr \
--enable-cxx \
--disable-static \
ABI=64 \
--docdir=/usr/share/doc/gmp-6.3.0
The meaning of the new configure options:
-
--enable-cxx -
This parameter enables C++ support
-
ABI=64 -
This package defaults to use N32 ABI on 64-bit MIPS systems, but LFS expects 64-bit ABI.
-
--docdir=/usr/share/doc/gmp-6.3.0 -
This variable specifies the correct place for the documentation.
Compile the package and generate the HTML documentation:
make make html
![[Important]](../images/important.png)
Important
The test suite for GMP in this section is considered critical. Do not skip it under any circumstances.
Test the results:
make check 2>&1 | tee gmp-check-log
![[Caution]](../images/caution.png)
Caution
The code in gmp is highly optimized for the processor where it is
built. Occasionally, the code that detects the processor
misidentifies the system capabilities and there will be errors in
the tests or other applications using the gmp libraries with the
message Illegal instruction.
In this case, gmp should be reconfigured with the option
--host=none-linux-gnu and rebuilt.
Ensure that at least 199 tests in the test suite passed. Check the results by issuing the following command:
awk '/# PASS:/{total+=$3} ; END{print total}' gmp-check-log
Install the package and its documentation:
make install make install-html