9342e73ae1
Previously we used --sysroot to set the sysroot explicitly. Unfortunately, this flag is not used directly by Clang to set the include path (<sysroot>/include) but is instead interpreted by the toolchain code. This means that even when the toolchain is explicitly set (using the --sysroot parameter), it may still decide to use a different include path such as <sysroot>/usr/include (such as on baremetal aarch64). This commit uses the Clang-internal -internal-isystem flag which sets the include directory directly (as a system include path). This should be more robust. The reason the --sysroot parameter has so far worked is that all existing targets happened to add <sysroot>/include as an include path. The relevant Clang code is here: https://github.com/llvm/llvm-project/blob/release/9.x/clang/lib/Driver/Driver.cpp#L4693-L4739 So far, RISC-V is handled by RISCVToolchain, Cortex-M targets by BareMetal (which seems to be specific to ARM unlike what the name says) and aarch64 fell back to Generic_ELF. |
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| .. | ||
| config.go | ||
| options.go | ||
| target.go | ||
| target_test.go | ||