2e5af56b05
seperately We can compile a module unit in 2 phase compilaton: ``` clang++ -std=c++20 a.cppm --precompile -o a.pcm clang++ -std=c++20 a.pcm -c -o a.o ``` And it is a general requirement that we need to compile a translation unit with and without -fPIC for static and shared libraries. But for C++20 modules with 2 phase compilation, it may be waste of time to compile them 2 times completely. It may be fine to generate one BMI and compile it with and without -fPIC seperately. e.g., ``` clang++ -std=c++20 a.cppm --precompile -o a.pcm clang++ -std=c++20 a.pcm -c -o a.o clang++ -std=c++20 a.pcm -c -fPIC -o a-PIC.o ``` Then we can save the time to parse a.cppm repeatedly.
22 lines
720 B
C++
22 lines
720 B
C++
// REQUIRES: x86-registered-target
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// RUN: rm -rf %t
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// RUN: mkdir %t
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// RUN: %clang_cc1 -std=c++20 %s -pic-level 2 -emit-llvm -o - | FileCheck %s
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// RUN: %clang_cc1 -std=c++20 %s -pic-level 2 -fmodule-output=%t/m.pcm -emit-llvm -o - \
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// RUN: | FileCheck %s
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//
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// RUN: %clang_cc1 -std=c++20 %s -emit-module-interface -o %t/m.pcm
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// RUN: %clang_cc1 -std=c++20 %t/m.pcm -pic-level 2 -emit-llvm -o - | FileCheck %s
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// RUN: %clang_cc1 -std=c++20 %t/m.pcm -emit-llvm -o - | FileCheck %s --check-prefix=NOPIC
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export module m;
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export int x;
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export int func() {
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return x;
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}
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// CHECK: ![[METADATA_NUM:[0-9]+]] = !{{{.*}}, !"PIC Level", i32 2}
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// NOPIC-NOT: ![[METADATA_NUM:[0-9]+]] = !{{{.*}}, !"PIC Level", i32 2}
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