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doc: Improve cmake instructions in README #1641

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doc: Improve cmake instructions in README #1641

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13 changes: 6 additions & 7 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -79,11 +79,10 @@ To maintain a pristine source tree, CMake encourages to perform an out-of-source

### Building on POSIX systems

$ mkdir build && cd build
$ cmake ..
$ cmake --build .
$ ctest # run the test suite
$ sudo cmake --install . # optional
$ cmake -B build
$ cmake --build build
$ ctest --test-dir build # run the test suite
$ sudo cmake --install build # optional

To compile optional modules (such as Schnorr signatures), you need to run `cmake` with additional flags (such as `-DSECP256K1_ENABLE_MODULE_SCHNORRSIG=ON`). Run `cmake .. -LH` to see the full list of available flags.

Expand All @@ -92,11 +91,11 @@ To compile optional modules (such as Schnorr signatures), you need to run `cmake
To alleviate issues with cross compiling, preconfigured toolchain files are available in the `cmake` directory.
For example, to cross compile for Windows:

$ cmake .. -DCMAKE_TOOLCHAIN_FILE=../cmake/x86_64-w64-mingw32.toolchain.cmake
$ cmake --build build -DCMAKE_TOOLCHAIN_FILE=../cmake/x86_64-w64-mingw32.toolchain.cmake

To cross compile for Android with [NDK](https://developer.android.com/ndk/guides/cmake) (using NDK's toolchain file, and assuming the `ANDROID_NDK_ROOT` environment variable has been set):

$ cmake .. -DCMAKE_TOOLCHAIN_FILE="${ANDROID_NDK_ROOT}/build/cmake/android.toolchain.cmake" -DANDROID_ABI=arm64-v8a -DANDROID_PLATFORM=28
$ cmake --build build -DCMAKE_TOOLCHAIN_FILE="${ANDROID_NDK_ROOT}/build/cmake/android.toolchain.cmake" -DANDROID_ABI=arm64-v8a -DANDROID_PLATFORM=28

### Building on Windows

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