Hello,

It looks like most  of the libraries specified by “-luuid -ldaos -ldfs -ldaos_common -lgurt -lpthread” are not linked. Something to keep in mind is that “CFLAGS=… LDFLAGS=… cmake…” should be executed as a single command so CFLAGS and LDFLAGS is propagated to the cmake environment. You can check this by running:

$ grep -B 1 "CMAKE_EXE_LINKER_FLAGS:" ${MY_MFU_BUILD_PATH}/CMakeCache.txt

grep -B 2 "CMAKE_SHARED_LINKER_FLAGS:" CMakeCache.txt

//Flags used by the linker during the creation of shared libraries

// during all build types.

CMAKE_SHARED_LINKER_FLAGS:STRING=-L/home/dbohning/daos/install/lib64/ -luuid -ldaos -ldfs -ldaos_common -lgurt -lpthread

Where CMAKE_SHARED_LINKER_FLAGS should be set to the LDFLAGS from the build command.

~Dalton Bohning

Hi,
I built MFU according to https://daosio.atlassian.net/wiki/spaces/DC/pages/4874571083/IO-500+ISC21 but encountered some "undefined reference" errors.
[ 39%] Linking C executable dbcast
/usr/bin/ld: ../common/libmfu.so: undefined reference to `d_hash_rec_insert'
/usr/bin/ld: ../common/libmfu.so: undefined reference to `dfs_lookup'
/usr/bin/ld: ../common/libmfu.so: undefined reference to `d_hash_rec_unlinked'
/usr/bin/ld: ../common/libmfu.so: undefined reference to `dfs_stat'
/usr/bin/ld: ../common/libmfu.so: undefined reference to `dfs_readdir'
/usr/bin/ld: ../common/libmfu.so: undefined reference to `d_hash_table_create'
/usr/bin/ld: ../common/libmfu.so: undefined reference to `dfs_obj_anchor_split'
/usr/bin/ld: ../common/libmfu.so: undefined reference to `dfs_release'
/usr/bin/ld: ../common/libmfu.so: undefined reference to `d_hash_rec_find'
/usr/bin/ld: ../common/libmfu.so: undefined reference to `dfs_obj_anchor_set'

The build command is:
git clone https://github.com/mchaarawi/mpifileutils -b pfind_integration "${MY_MFU_SOURCE_PATH}" &&
mkdir -p "${MY_MFU_BUILD_PATH}" &&
cd "${MY_MFU_BUILD_PATH}" &&
CFLAGS="-I${MY_DAOS_INSTALL_PATH}/include" \
LDFLAGS="-L${MY_DAOS_INSTALL_PATH}/lib64/ -luuid -ldaos -ldfs -ldaos_common -lgurt -lpthread" \
cmake "${MY_MFU_SOURCE_PATH}" \
-DENABLE_XATTRS=OFF \
-DWITH_DTCMP_PREFIX=${MY_MFU_INSTALL_PATH} \
-DWITH_LibCircle_PREFIX=${MY_MFU_INSTALL_PATH} \
-DCMAKE_INSTALL_PREFIX=${MY_MFU_INSTALL_PATH} &&
make -j8 install

And there is libgurt.so in ${MY_DAOS_INSTALL_PATH}/lib64/.
$ nm -D ${MY_DAOS_INSTALL_PATH}/lib64/libgurt.so | grep d_hash_rec_insert
000000000000fb40 T d_hash_rec_insert
0000000000010100 T d_hash_rec_insert_anonym

But looks like libgurt.so is not linked by libmfu.so.
$ ldd src/common/libmfu.so
linux-vdso.so.1 (0x00007ffda13f3000)
libmpi.so.40 => /lib/x86_64-linux-gnu/libmpi.so.40 (0x00007fd75c830000)
libdtcmp.so => /home/daos_agent/install/lib/libdtcmp.so (0x00007fd75c814000)
libcircle.so.2 => /home/daos_agent/install/lib/libcircle.so.2 (0x00007fd75c806000)
libbz2.so.1.0 => /lib/x86_64-linux-gnu/libbz2.so.1.0 (0x00007fd75c7f3000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007fd75c601000)
libopen-rte.so.40 => /lib/x86_64-linux-gnu/libopen-rte.so.40 (0x00007fd75c545000)
libopen-pal.so.40 => /lib/x86_64-linux-gnu/libopen-pal.so.40 (0x00007fd75c497000)
libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007fd75c348000)
libhwloc.so.15 => /lib/x86_64-linux-gnu/libhwloc.so.15 (0x00007fd75c2f7000)
libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007fd75c2d4000)
liblwgrp.so => /home/daos_agent/install/lib/liblwgrp.so (0x00007fd75c2c5000)
/lib64/ld-linux-x86-64.so.2 (0x00007fd75c9b2000)
libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007fd75c2a7000)
libevent-2.1.so.7 => /lib/x86_64-linux-gnu/libevent-2.1.so.7 (0x00007fd75c251000)
libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007fd75c24b000)
libutil.so.1 => /lib/x86_64-linux-gnu/libutil.so.1 (0x00007fd75c246000)
libevent_pthreads-2.1.so.7 => /lib/x86_64-linux-gnu/libevent_pthreads-2.1.so.7 (0x00007fd75c241000)
libudev.so.1 => /lib/x86_64-linux-gnu/libudev.so.1 (0x00007fd75c214000)
libltdl.so.7 => /lib/x86_64-linux-gnu/libltdl.so.7 (0x00007fd75c207000)"