Changeset 5a0f8e

Timestamp:

Jun 2, 2008, 10:28:05 AM (17 years ago)

Author:

Frederik Heber <heber@…>

Children:

0cc323

Parents:

9842d8

Message:

LIBS instead of MPILIBS is the place where something like "-lmpich" has to be specified.

Location:

pcp

Files:

• README (modified) (2 diffs)
• configure.ac (modified) (1 diff)

pcp/README

@@ -21 +21 @@
 
 In general, note that the following command line variables will influence configure:
-CC, CXX, CFLAGS, LDFLAGS, LD_LIBRARY_PATH, MPICC, MPILIBS
+CC, CXX, CFLAGS, LDFLAGS, LD_LIBRARY_PATH, MPICC, MPILIBS, LIBS
 Try specifying these tailored to your needs if checks of configure fail.
 
@@ -29 +29 @@
 In order to compile a parallel version an mpi package such as mpich is needed. If present there are two possibilities:
 1. Configure finds 'mpicc' which is basically just a link to gcc with includes, library paths and needed libs. Everything easy and fine.
-2. It does not, then you have to specify the paths by yourself by prepending the configure command as follows
-                MPICC="gcc -I/path/to/mpi/installation/include" MPILIBS="-L/path/to/mpi/installation/lib -Wl,-rpath=/path/to/mpi/installation/lib" ./configure andsoon
-         Note that MPILIBS will be suffixed to LDFLAGS and configure looks for an libmpich in the given dirs.
+2. It does not, then you have to specify the paths by yourself by prepending the configure command with something such as the following
+                MPICC="gcc -I/path/to/mpi/installation/include" LDFLAGS="-L/path/to/mpi/installation/lib -Wl,-rpath=/path/to/mpi/installation/lib" LIBS="-lmpich" ./configure andsoon
+Note that MPILIBS is the LDFLAGS for MPICC, whereas LIBS are additional libs appended at the very end (and the order of the libs is important, those at the end are those incorporated first and libmpich must be one of the first).
 
 WINDOWS

pcp/configure.ac

@@ -55 +55 @@
                 if ! test x"$MPILIBS" = x; then
                         LDFLAGS="$LDFLAGS $MPILIBS"
-                        AC_CHECK_LIB(mpich, MPI_Allreduce, ,AC_MSG_ERROR([compatible mpich library not found]))
+                        #AC_CHECK_LIB(mpich, MPI_Allreduce, ,AC_MSG_ERROR([compatible mpich library not found]))
                 fi
         fi