# REQUIRES: shell
# UNSUPPORTED: system-windows

# This test demonstrates "layered" multilib in which more than one
# multilib is matched.
# For example a multilib containing only a no-exceptions libc++ could
# be layered on top of a multilib containing C libs. This avoids the
# need to duplicate the C library for every libc++ variant.
# However -fno-exceptions is not yet supported for multilib selection
# so we use a more contrived -mfloat-abi example instead.

# RUN: rm -rf %T/baremetal_multilib_layered
# RUN: mkdir -p %T/baremetal_multilib_layered/bin
# RUN: mkdir -p %T/baremetal_multilib_layered/lib/clang-runtimes
# RUN: ln -s %clang %T/baremetal_multilib_layered/bin/clang
# RUN: ln -s %s %T/baremetal_multilib_layered/lib/clang-runtimes/multilib.yaml

# RUN: %T/baremetal_multilib_layered/bin/clang -no-canonical-prefixes -x c++ %s -### -o %t.out 2>&1 \
# RUN:     --target=thumbv7m-none-eabi -mfloat-abi=softfp --sysroot= \
# RUN:   | FileCheck -DSYSROOT=%T/baremetal_multilib_layered %s
# CHECK:      "-cc1" "-triple" "thumbv7m-none-unknown-eabi"
# CHECK-SAME: "-internal-isystem" "[[SYSROOT]]/bin/../lib/clang-runtimes/softfp/include/c++/v1"
# CHECK-SAME: "-internal-isystem" "[[SYSROOT]]/bin/../lib/clang-runtimes/soft/include/c++/v1"
# CHECK-SAME: "-internal-isystem" "[[SYSROOT]]/bin/../lib/clang-runtimes/softfp/include"
# CHECK-SAME: "-internal-isystem" "[[SYSROOT]]/bin/../lib/clang-runtimes/soft/include"
# CHECK-NEXT: "-L[[SYSROOT]]/bin/../lib/clang-runtimes/softfp/lib"
# CHECK-SAME: "-L[[SYSROOT]]/bin/../lib/clang-runtimes/soft/lib"

# RUN: %T/baremetal_multilib_layered/bin/clang -no-canonical-prefixes -print-multi-directory 2>&1 \
# RUN:     --target=arm-none-eabi -mfloat-abi=softfp --sysroot= \
# RUN:   | FileCheck --check-prefix=CHECK-PRINT-MULTI-DIRECTORY %s
# CHECK-PRINT-MULTI-DIRECTORY:      soft
# CHECK-PRINT-MULTI-DIRECTORY-NEXT: softfp

---
MultilibVersion: 1.0
Variants:
- Dir: soft
  Flags: [-mfloat-abi=soft]
- Dir: softfp
  Flags: [-mfloat-abi=softfp]
Mappings:
- Match: -mfloat-abi=softfp
  Flags: [-mfloat-abi=soft]
...