8.19.2. Contents of GMP
Installed Libraries:
libgmp.so and libgmpxx.so
Installed directory:
/usr/share/doc/gmp-6.2.1
8.19. GMP-6.2.1
The GMP package contains math libraries. These have useful functions for arbitrary precision arithmetic.
Approximate build time:
1.0 SBU
Required disk space:
52 MB
8.19.1. Installation of GMP
![[Note]](../images/note.png)
Note
If you are building for 32-bit x86, but you have a CPU which is
capable of running 64-bit code and you have specified CFLAGS in the environment, the configure script
will attempt to configure for 64-bits and fail. Avoid this by
invoking the configure command below with
ABI=32 ./configure ...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 running the following:
cp -v configfsf.guess config.guess cp -v configfsf.sub config.sub
Prepare GMP for compilation:
ABI=64 ./configure --prefix=/usr \
--enable-cxx \
--disable-static \
--docdir=/usr/share/doc/gmp-6.2.1
The meaning of the new configure options:
-
ABI=64 -
GMP defaults to build for N32 ABI on 64-bit MIPS. This overrides it.
-
--enable-cxx -
This parameter enables C++ support
-
--docdir=/usr/share/doc/gmp-6.2.1 -
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 --build=x86_64-pc-linux-gnu and rebuilt.
Ensure that all 197 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