gcc support issue for dynamic arch on aarch64 #5665
Description
Building 0.3.31 on aarch64
gcc 9.3.0 with -DDYNAMIC_ARCH=ON
12b9fbdd3450: /build/OpenBLAS-0.3.31/utest/test_kernel_regress.c: In function '__ctest_kernel_regress_skx_avx_run':
12b9fbdd3450: /build/OpenBLAS-0.3.31/utest/test_kernel_regress.c:27:15: warning: variable 'info' set but not used [-Wunused-but-set-variable]
12b9fbdd3450: 27 | int i, j, info;
12b9fbdd3450: | ^~~~
12b9fbdd3450: [ 88%] Linking C executable openblas_utest
12b9fbdd3450: /home/utils/binutils-2.44/bin/ld: ../lib/libopenblas.a(dynamic_arm64.c.o): in function `gotoblas_corename':
12b9fbdd3450: dynamic_arm64.c:(.text+0x1f0): undefined reference to `gotoblas_NEOVERSEV1'
12b9fbdd3450: /home/utils/binutils-2.44/bin/ld: dynamic_arm64.c:(.text+0x1f4): undefined reference to `gotoblas_NEOVERSEV1'
12b9fbdd3450: /home/utils/binutils-2.44/bin/ld: dynamic_arm64.c:(.text+0x21c): undefined reference to `gotoblas_NEOVERSEN2'
12b9fbdd3450: /home/utils/binutils-2.44/bin/ld: dynamic_arm64.c:(.text+0x220): undefined reference to `gotoblas_NEOVERSEN2'
12b9fbdd3450: /home/utils/binutils-2.44/bin/ld: dynamic_arm64.c:(.text+0x248): undefined reference to `gotoblas_NEOVERSEN2'
12b9fbdd3450: /home/utils/binutils-2.44/bin/ld: dynamic_arm64.c:(.text+0x24c): undefined reference to `gotoblas_NEOVERSEN2'
12b9fbdd3450: /home/utils/binutils-2.44/bin/ld: dynamic_arm64.c:(.text+0x2cc): undefined reference to `gotoblas_ARMV8SVE'
12b9fbdd3450: /home/utils/binutils-2.44/bin/ld: dynamic_arm64.c:(.text+0x2d0): undefined reference to `gotoblas_ARMV8SVE'
12b9fbdd3450: /home/utils/binutils-2.44/bin/ld: dynamic_arm64.c:(.text+0x2f8): undefined reference to `gotoblas_A64FX'
12b9fbdd3450: /home/utils/binutils-2.44/bin/ld: dynamic_arm64.c:(.text+0x2fc): undefined reference to `gotoblas_A64FX'
12b9fbdd3450: /home/utils/binutils-2.44/bin/ld: dynamic_arm64.c:(.text+0x324): undefined reference to `gotoblas_ARMV8SVE'
12b9fbdd3450: /home/utils/binutils-2.44/bin/ld: dynamic_arm64.c:(.text+0x328): undefined reference to `gotoblas_ARMV8SVE'
12b9fbdd3450: /home/utils/binutils-2.44/bin/ld: ../lib/libopenblas.a(dynamic_arm64.c.o): in function `force_coretype':
gcc 9.3.0 with -DTARGET=NEOVERSEV2
506a83c86ca5: CMake Error at cmake/system.cmake:357 (message):
506a83c86ca5: Compiler $/home/utils/gcc-9.3.0-3/bin/gcc 9.3.0 does not support Neoverse
506a83c86ca5: V2.
506a83c86ca5: Call Stack (most recent call first):
506a83c86ca5: CMakeLists.txt:125 (include)
Using a newer gcc that supports these CPUs resolves the original DYNAMIC_ARCH issue.
These optimizations should not be in use/disabled when DYNAMIC_ARCH is on and the compiler does not support them?
Or an additional check for gcc version?
EDIT: (Neoverse V2 might have been a bad example, same happens with the other that are actually reported in the output.)