# CMake Error(could not find HDF5) **URL:** \ **Category:** User Support\ **Created:** [November 5, 2020, 12:10pm UTC](https://openmc.discourse.group/t/cmake-error-could-not-find-hdf5/850 "2020-11-05T12:10:00Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![kingyue](https://yyz2.discourse-cdn.com/free1/user_avatar/openmc.discourse.group/kingyue/32/507_2.png) [@kingyue](https://openmc.discourse.group/u/kingyue)\ **Post date:** [November 5, 2020, 12:10pm UTC](https://openmc.discourse.group/t/cmake-error-could-not-find-hdf5/850/1 "2020-11-05T12:10:00Z")
Hi all, I recompiled OpenMC today and met the following error. ``` -- The C compiler identification is GNU 9.3.0 -- The CXX compiler identification is GNU 9.3.0 -- Check for working C compiler: /usr/bin/cc -- Check for working C compiler: /usr/bin/cc -- works -- Detecting C compiler ABI info -- Detecting C compiler ABI info - done -- Detecting C compile features -- Detecting C compile features - done -- Check for working CXX compiler: /usr/bin/c++ -- Check for working CXX compiler: /usr/bin/c++ -- works -- Detecting CXX compiler ABI info -- Detecting CXX compiler ABI info - done -- Detecting CXX compile features -- Detecting CXX compile features - done -- Unable to determine HDF5 C flags from HDF5 wrapper. -- Unable to determine HDF5 C version from HDF5 wrapper. CMake Error at /usr/share/cmake-3.16/Modules/FindPackageHandleStandardArgs.cmake:146 (message): Could NOT find HDF5 (missing: HDF5_INCLUDE_DIRS) (found version "") Call Stack (most recent call first): /usr/share/cmake-3.16/Modules/FindPackageHandleStandardArgs.cmake:393 (_FPHSA_FAILURE_MESSAGE) /usr/share/cmake-3.16/Modules/FindHDF5.cmake:929 (find_package_handle_standard_args) CMakeLists.txt:62 (find_package) ``` I’ve tried reinstall libhdf5-dev and cmake. Still not work. Had somebody similar problems? ---
**Author:** ![Pranto](https://yyz2.discourse-cdn.com/free1/user_avatar/openmc.discourse.group/pranto/32/489_2.png) [@Pranto](https://openmc.discourse.group/u/Pranto)\ **Post date:** [November 5, 2020, 12:45pm UTC](https://openmc.discourse.group/t/cmake-error-could-not-find-hdf5/850/2 "2020-11-05T12:45:47Z")
@kingyue, What is the output of `h5cc -showconfig` command? Did you try with ```bash HDF5_ROOT=/usr cmake .. ``` to compile? ---
**Author:** ![kingyue](https://yyz2.discourse-cdn.com/free1/user_avatar/openmc.discourse.group/kingyue/32/507_2.png) [@kingyue](https://openmc.discourse.group/u/kingyue)\ **Post date:** [November 6, 2020, 2:18am UTC](https://openmc.discourse.group/t/cmake-error-could-not-find-hdf5/850/3 "2020-11-06T02:18:59Z")
> [@Pranto](#): > > `HDF5_ROOT=/usr` I found that `h5cc -showconfig` show the config of the h5cc installed in anaconda3. Then I removed the h5cc in anaconda, reinstalled libhdf5-dev again and tried `HDF5_ROOT=/usr cmake ..`. Still the same problem. `h5cc -showconfig` now shows the following output: ```auto SUMMARY OF THE HDF5 CONFIGURATION ================================= General Information: ------------------- HDF5 Version: 1.10.4 Configured on: Mon, 13 Apr 2020 12:15:08 +0000 Configured by: Debian Host system: x86_64-pc-linux-gnu Uname information: Debian Byte sex: little-endian Installation point: /usr Flavor name: serial Compiling Options: ------------------ Build Mode: production Debugging Symbols: no Asserts: no Profiling: no Optimization Level: high Linking Options: ---------------- Libraries: static, shared Statically Linked Executables: LDFLAGS: -Wl,-Bsymbolic-functions -Wl,-z,relro H5_LDFLAGS: -Wl,--version-script,$(top_srcdir)/debian/map_serial.ver AM_LDFLAGS: Extra libraries: -lpthread -lsz -lz -ldl -lm Archiver: ar AR_FLAGS: cr Ranlib: x86_64-linux-gnu-ranlib Languages: ---------- C: yes C Compiler: /usr/bin/gcc CPPFLAGS: -Wdate-time -D_FORTIFY_SOURCE=2 H5_CPPFLAGS: -D_GNU_SOURCE -D_POSIX_C_SOURCE=200112L -DNDEBUG -UH5_DEBUG_API AM_CPPFLAGS: C Flags: -g -O2 -fdebug-prefix-map=$(top_srcdir)=. -fstack-protector-strong -Wformat -Werror=format-security H5 C Flags: -std=c99 -pedantic -Wall -Wextra -Wbad-function-cast -Wc++-compat -Wcast-align -Wcast-qual -Wconversion -Wdeclaration-after-statement -Wdisabled-optimization -Wfloat-equal -Wformat=2 -Winit-self -Winvalid-pch -Wmissing-declarations -Wmissing-include-dirs -Wmissing-prototypes -Wnested-externs -Wold-style-definition -Wpacked -Wpointer-arith -Wredundant-decls -Wshadow -Wstrict-prototypes -Wswitch-default -Wswitch-enum -Wundef -Wunused-macros -Wunsafe-loop-optimizations -Wwrite-strings -finline-functions -s -Wno-inline -Wno-aggregate-return -Wno-missing-format-attribute -Wno-missing-noreturn -O AM C Flags: Shared C Library: yes Static C Library: yes Fortran: yes Fortran Compiler: /usr/bin/gfortran Fortran Flags: -g -O2 -fdebug-prefix-map=$(top_srcdir)=. -fstack-protector-strong H5 Fortran Flags: -pedantic -Wall -Wextra -Wunderflow -Wimplicit-interface -Wsurprising -Wno-c-binding-type -s -O2 AM Fortran Flags: Shared Fortran Library: yes Static Fortran Library: yes C++: yes C++ Compiler: /usr/bin/g++ C++ Flags: -g -O2 -fdebug-prefix-map=$(top_srcdir)=. -fstack-protector-strong -Wformat -Werror=format-security H5 C++ Flags: -pedantic -Wall -W -Wundef -Wshadow -Wpointer-arith -Wcast-qual -Wcast-align -Wwrite-strings -Wconversion -Wredundant-decls -Winline -Wsign-promo -Woverloaded-virtual -Wold-style-cast -Weffc++ -Wreorder -Wnon-virtual-dtor -Wctor-dtor-privacy -Wabi -finline-functions -s -O AM C++ Flags: Shared C++ Library: yes Static C++ Library: yes Java: yes Java Compiler: /usr/bin/java (openjdk 11.0.7-ea 2020-04-14) Features: --------- Parallel HDF5: no Parallel Filtered Dataset Writes: no Large Parallel I/O: no High-level library: yes Threadsafety: yes Default API mapping: v18 With deprecated public symbols: yes I/O filters (external): deflate(zlib),szip(encoder) MPE: no Direct VFD: no dmalloc: no Packages w/ extra debug output: none API tracing: no Using memory checker: no Memory allocation sanity checks: no Metadata trace file: no Function stack tracing: no Strict file format checks: no Optimization instrumentation: no ``` ---
**Author:** ![kingyue](https://yyz2.discourse-cdn.com/free1/user_avatar/openmc.discourse.group/kingyue/32/507_2.png) [@kingyue](https://openmc.discourse.group/u/kingyue)\ **Post date:** [November 6, 2020, 2:26am UTC](https://openmc.discourse.group/t/cmake-error-could-not-find-hdf5/850/4 "2020-11-06T02:26:40Z")
Wow, after I delete Cmake cache and launch cmake again. It works!! Thank you very much @Pranto !!! You saved my weekend