[mpich-discuss] #error "unknown size for unsigned int."

[Jed Brown]

I'm trying to install mpich-3.0rc1 on an ancient (RHEL4) machine and get
this error.

Making all in tools/topo/hwloc/hwloc
make[3]: Entering directory
`/work/parmod/mpich-3.0rc1/src/pm/hydra/tools/topo/hwloc/hwloc'
Making all in src
make[4]: Entering directory
`/work/parmod/mpich-3.0rc1/src/pm/hydra/tools/topo/hwloc/hwloc/src'
/bin/sh ../../../../../libtool  --tag=CC   --mode=compile gcc
-DHAVE_CONFIG_H -I. -I../../../../../include
-I../../../../../tools/topo/hwloc/hwloc/include/private/autogen
-I../../../../../tools/topo/hwloc/hwloc/include/hwloc/autogen
 -I/work/parmod/mpich-3.0rc1/src/pm/hydra/tools/topo/hwloc/hwloc/include
-I/work/parmod/mpich-3.0rc1/src/pm/hydra/tools/topo/hwloc/hwloc/include
-DHWLOC_INSIDE_LIBHWLOC
-I/work/parmod/mpich-3.0rc1/src/pm/hydra/tools/topo/hwloc/hwloc/include
-I/work/parmod/mpich-3.0rc1/src/pm/hydra/tools/topo/hwloc/hwloc/include
 -I/work/parmod/mpich-3.0rc1/src/mpl/include
-I/work/parmod/mpich-3.0rc1/src/mpl/include
-I/work/parmod/mpich-3.0rc1/src/openpa/src
-I/work/parmod/mpich-3.0rc1/src/openpa/src
-I/work/parmod/mpich-3.0rc1/src/mpi/romio/include -fvisibility=hidden
 -I/usr/include/libxml2   -fvisibility=hidden  -I/usr/include/libxml2
 -O2  -MT traversal.lo -MD -MP -MF .deps/traversal.Tpo -c -o traversal.lo
traversal.c
libtool: compile:  gcc -DHAVE_CONFIG_H -I. -I../../../../../include
-I../../../../../tools/topo/hwloc/hwloc/include/private/autogen
-I../../../../../tools/topo/hwloc/hwloc/include/hwloc/autogen
-I/work/parmod/mpich-3.0rc1/src/pm/hydra/tools/topo/hwloc/hwloc/include
-I/work/parmod/mpich-3.0rc1/src/pm/hydra/tools/topo/hwloc/hwloc/include
-DHWLOC_INSIDE_LIBHWLOC
-I/work/parmod/mpich-3.0rc1/src/pm/hydra/tools/topo/hwloc/hwloc/include
-I/work/parmod/mpich-3.0rc1/src/pm/hydra/tools/topo/hwloc/hwloc/include
-I/work/parmod/mpich-3.0rc1/src/mpl/include
-I/work/parmod/mpich-3.0rc1/src/mpl/include
-I/work/parmod/mpich-3.0rc1/src/openpa/src
-I/work/parmod/mpich-3.0rc1/src/openpa/src
-I/work/parmod/mpich-3.0rc1/src/mpi/romio/include -fvisibility=hidden
-I/usr/include/libxml2 -fvisibility=hidden -I/usr/include/libxml2 -O2 -MT
traversal.lo -MD -MP -MF .deps/traversal.Tpo -c traversal.c  -fPIC -DPIC -o
.libs/traversal.o
In file included from traversal.c:12:
/work/parmod/mpich-3.0rc1/src/pm/hydra/tools/topo/hwloc/hwloc/include/private/misc.h:41:2:
error: #error "unknown size for unsigned int."
make[4]: *** [traversal.lo] Error 1
make[4]: Leaving directory
`/work/parmod/mpich-3.0rc1/src/pm/hydra/tools/topo/hwloc/hwloc/src'
make[3]: *** [all-recursive] Error 1
make[3]: Leaving directory
`/work/parmod/mpich-3.0rc1/src/pm/hydra/tools/topo/hwloc/hwloc'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/work/parmod/mpich-3.0rc1/src/pm/hydra'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/work/parmod/mpich-3.0rc1'
make: *** [all] Error 2


It wasn't obvious to me from the logs why this was being tripped. Configure
log attached.
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