diff options
Diffstat (limited to 'INSTALL')
| -rw-r--r-- | INSTALL | 21 |
1 files changed, 15 insertions, 6 deletions
@@ -122,6 +122,11 @@ to build it with them. Just do this in step 1: where GMPBUILD is the GMP build directory. The needed header files are: gmp-impl.h, longlong.h and all the necessary headers to use them. +As gmp-impl.h and longlong.h are only in the GMP source directory, +you first need to copy these files to the build directory if it is +different (there may be other workarounds, such as setting $CPPFLAGS +to search the GMP source directory). + Warning: the library obtained in this way may use some internal GMP symbols, and thus dynamically linking your software with a different version of GMP might fail, even though it is declared as compatible @@ -162,12 +167,8 @@ build an optimized file "mparam.h" for your specific architecture. so that DIR will have a lower precedence. Also, this may not work if DIR is a system directory. ---with-gmp-build=DIR assumes that DIR contains the source of GMP and - enables the use of GMP internals. - Try to set CC/CFLAGS to GMP's ones. This is not - guaranteed to work as the configure script does - some compiler tests earlier, and the change may - be too late. +--with-gmp-build=DIR assumes that DIR contains the GMP build directory, + and enables the use of GMP internals (see above). Warning! This option and the group of options --with-gmp are mutually exclusive. @@ -183,6 +184,14 @@ build an optimized file "mparam.h" for your specific architecture. GCC, it may not currently support GCC's __thread storage class. +Note: By default, the configure script tries to set CC/CFLAGS to GMP's +ones (this feature needs GMP 4.3.0 or later, or the --with-gmp-build +option). However this is not guaranteed to work as the configure script +does some compiler tests earlier, and the change may be too late. Also, +the values obtained from GMP may be incorrect if GMP has been built +on a different machine. In such a case, the user may need to specify +CC/CFLAGS as explained below. + Run "./configure --help" to see the other options (autoconf default options). |