How do you set CMAKE_C_COMPILER and CMAKE_CXX_COMPILER for building Assimp for iOS?
Solution 1:
Option 1:
You can set CMake variables at command line like this:
cmake -D CMAKE_C_COMPILER="/path/to/your/c/compiler/executable" -D CMAKE_CXX_COMPILER "/path/to/your/cpp/compiler/executable" /path/to/directory/containing/CMakeLists.txt
See this to learn how to create a CMake cache entry.
Option 2:
In your shell script build_ios.sh
you can set environment variables CC
and CXX
to point to your C and C++ compiler executable respectively, example:
export CC=/path/to/your/c/compiler/executable
export CXX=/path/to/your/cpp/compiler/executable
cmake /path/to/directory/containing/CMakeLists.txt
Option 3:
Edit the CMakeLists.txt file of "Assimp": Add these lines at the top (must be added before you use project()
or enable_language()
command)
set(CMAKE_C_COMPILER "/path/to/your/c/compiler/executable")
set(CMAKE_CXX_COMPILER "/path/to/your/cpp/compiler/executable")
See this to learn how to use set
command in CMake. Also this is a useful resource for understanding use of some of the common CMake variables.
Here is the relevant entry from the official FAQ: https://gitlab.kitware.com/cmake/community/wikis/FAQ#how-do-i-use-a-different-compiler
Solution 2:
The cc and cxx is located inside /Applications/Xcode.app
. This should find the right paths
export CXX=`xcrun -find c++`
export CC=`xcrun -find cc`
Solution 3:
SOLUTIONS
- Sometimes the project is created before installing
g++
. So installg++
first and then recreate your project. This worked for me. - Paste the following line in CMakeCache.txt:
CMAKE_CXX_COMPILER:FILEPATH=/usr/bin/c++
Note the path to g++
depends on OS. I have used my fedora path obtained using which g++