sgxssl: enable pointing sgxssl build to alternative glibc headers #436
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The enclave musts be built with headers from a specific glibc version for the sake of reproducibility. It does not actually link to glibc, merely requiring a few self contained definitions. In the NixOS build env the glibc system include directories get set through various wrapper scripts NixOS creates. When attempting a reproducible build outside of NixOS though, we can't rely on the compiler having the matching glibc system include dirs. Instead there needs to be a way to inject "-isystem/some/path" args into the enclave compiler flags. A related commit in the SGX SDK buildenv.mk adds support for a "ENCLAVE_SYSTEM_INCLUDES" make var that can be set by the person triggering 'make', to provide a way to inject system include directories to the enclave build process. This commit sures that $(ENCLAVE_SYSTEM_INCLUDES) is passed on to the build of sgxssl. Signed-off-by: Daniel P. Berrangé <[email protected]>
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Note this PR has a dependency on intel/linux-sgx#1062 requiring that to be merged before this is useful |
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The enclave musts be built with headers from a specific glibc version for the sake of reproducibility. It does not actually link to glibc, merely requiring a few self contained definitions. In the NixOS build env the glibc system include directories get set through various wrapper scripts NixOS creates.
When attempting a reproducible build outside of NixOS though, we can't rely on the compiler having the matching glibc system include dirs. Instead there needs to be a way to inject "-isystem/some/path" args into the enclave compiler flags.
A related commit in the SGX SDK buildenv.mk adds support for a "ENCLAVE_SYSTEM_INCLUDES" make var that can be set by the person triggering 'make', to provide a way to inject system include directories to the enclave build process.
This commit sures that $(ENCLAVE_SYSTEM_INCLUDES) is passed on to the build of sgxssl.