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rocm-systems/samples/2_Cookbook/19_cmake_lang/README.md
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Rahul Manocha 76dd8ea569 SWDEV-436821 Update hip samples Readme files
Change-Id: I6bf3a72eac4a4242cb2dbf4e6eee73e0e1bef2ef
2023-12-21 14:20:44 -05:00

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### This will test cmake lang support: CXX and Fortran
I. Prepare
1) You must install cmake version 3.18 or above to support LINK_LANGUAGE.
Otherwise, Fortran build will fail.
To download the latest cmake, see https://cmake.org/download/.
2) If there is no Fortran on your system, you must install it via,
sudo apt install gfortran
II. Build
```
$ mkdir -p build; cd build
$ rm -rf *;
$ CXX="$(hipconfig -l)"/clang++ FC=$(which gfortran) cmake -DCMAKE_PREFIX_PATH=/opt/rocm ..
$ cmake ..
$ make
```
Note, users may need to add AMD GPU support, if test failed, for example,
```
$ CXX="$(hipconfig -l)"/clang++ FC=$(which gfortran) cmake -DCMAKE_PREFIX_PATH=/opt/rocm -DAMDGPU_TARGETS="gfx1102" ..
```
To enable compiler auto detection of gpu users may need to add ADMGPU support as command line option,
if test failed to run, for example,
```
$ CXX="$(hipconfig -l)"/clang++ FC=$(which gfortran) cmake -DCMAKE_PREFIX_PATH=/opt/rocm -DAMDGPU_TARGETS=native ..
```
III. Test
```
$ ./test_fortran
Succeeded testing Fortran!
$ ./test_cpp
Device name AMD Radeon Graphics
PASSED!
```