Artturin c25f7f894f stdenv: Add hack to fix cmake canExecute cross-compilation ... Fixes `pkgsCross.musl64.llvmPackages_16.clang.cc` on `x86_64-linux`, which used to fail with `/bin/sh: clang-tblgen: not found`. Same hack is used in other projects: https://github.com/search?q=%2FCMAKE_CROSSCOMPILING_EMULATOR.%2B%5C%2Fusr%5C%2Fbin%5C%2Fenv%2F+NOT+is%3Afork&type=code Comment from 30435a9d0f/build/cmake/HostLinuxToolchain.cmake (L64) > Required to run host Linux executables during the build itself. > An example would be https://gitub.com/KhronosGroup/Vulkan-Loader and > its "asm_offset" program. > > NOTE: Alternatives have been tried unsuccessfully, i.e.: > > With $(set CMAKE_CROSSCOMPILING_EMULATOR), the build fails because > the CMake ninja/Make script tries to find the executable in the current > path, as in: > > [3/16] Generating gen_defines.asm > FAILED: loader/gen_defines.asm > cd /tmp/cc/build-Vulkan-Loader/loader && asm_offset GAS > /bin/sh: asm_offset: command not found > ninja: build stopped: subcommand failed. > > With $(set CMAKE_CROSSCOMPILING_EMULATOR ""), the build fails because > the shell cannot find the "" program as in: > > [3/16] Generating gen_defines.asm > FAILED: loader/gen_defines.asm > cd /tmp/cc/build-Vulkan-Loader/loader && "" /tmp/cc/build-Vulkan-Loader/loader/asm_offset GAS > /bin/sh: : command not found > ninja: build stopped: subcommand failed. > > It seems that the root of the problem comes from how the CMake function > cmCustomCommandGenerator::GetArgc0Location() computes the target > executable's location. At this point it's unclear whether this is a CMake > bug or a feature. Risicle discovered this hack. Co-authored-by: Robert Scott <code@humanleg.org.uk>		2023-08-29 22:12:06 +03:00
..
builder.sh	Revert "Merge remote-tracking branch 'origin/python-unstable' into staging-next"	2021-09-05 15:02:25 +02:00
check-meta.nix	stdenv: factor out meta attr augmentation for reusability	2023-05-01 20:18:11 +03:00
common-path.nix	stdenv/common-path.nix: move to stdenv/generic/	2022-07-29 18:24:00 -04:00
default-builder.sh	stdenv: support opt-in __structuredAttrs	2022-12-08 06:13:19 +02:00
default.nix	Revert "stdenv: use improved strip.sh for aarch64-linux"	2023-07-31 11:20:15 +02:00
make-derivation.nix	stdenv: Add hack to fix cmake canExecute cross-compilation	2023-08-29 22:12:06 +03:00
setup.sh	stdenv: Print _allFlags debug output to stderr	2023-08-10 17:35:07 +03:00