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[Driver] Make -print-libgcc-file-name print compiler-rt lib when used Make the -print-libgcc-file-name option print an appropriate compiler runtime library, that is libgcc.a if gcc runtime is used and an appropriate compiler-rt library if that runtime is used. The main use for this is to allow linking executables built with -nodefaultlibs (e.g. to avoid linking to the standard C++ library) to the compiler runtime library, e.g. using: clang++ ... -nodefaultlibs $(clang++ ... -print-libgcc-file-name) in which case currently a program built like this linked to the gcc runtime unconditionally. The patch fixes it to use compiler-rt libraries instead when compiler-rt is the active runtime. Differential Revision: https://reviews.llvm.org/D25338 llvm-svn: 283746
2016-10-10 20:23:40 +08:00
// Test that -print-libgcc-file-name correctly respects -rtlib=libgcc.
// REQUIRES: libgcc
// RUN: %clang -rtlib=libgcc -print-libgcc-file-name 2>&1 \
// RUN: | FileCheck --check-prefix=CHECK-LIBGCC %s
// CHECK-LIBGCC: libgcc.a