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Implement system include detection for CMake build

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The Bazel build already queries the current toolchain for its system include
directories. This change brings feature parity and is necessary for systems
with unusual include locations.

PiperOrigin-RevId: 332195812
Change-Id: Ie81d614d21e90b4bd9edf2084ef80bf0d85dd750
This commit is contained in:
Christian Blichmann 2020-09-17 03:07:47 -07:00 committed by Copybara-Service
parent a68b851c2c
commit 13c28403a6
2 changed files with 10 additions and 5 deletions
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10
cmake/SapiBuildDefs.cmake
View File

@ -132,7 +132,6 @@ function(add_sapi_library)
set(_sapi_embed_dir "${CMAKE_CURRENT_BINARY_DIR}")
set(_sapi_embed_name "${_sapi_NAME}")
endif()
# TODO(cblichmann): Implement sapi_isystem
if(SAPI_ENABLE_GENERATOR)
add_custom_command(
OUTPUT "${_sapi_gen_header}"
@ -149,9 +148,14 @@ function(add_sapi_library)
VERBATIM
)
else()
set(_sapi_isystem "${_sapi_NAME}.isystem")
list_join(_sapi_full_inputs "," _sapi_full_inputs)
add_custom_command(
OUTPUT "${_sapi_gen_header}"
OUTPUT "${_sapi_gen_header}" "${_sapi_isystem}"
COMMAND sh -c
"${CMAKE_CXX_COMPILER} -E -x c++ -v /dev/null 2>&1 | \
awk '/> search starts here:/{f=1;next}/^End of search/{f=0}f{print $1}' \
> \"${_sapi_isystem}\""
COMMAND "${SAPI_PYTHON3_EXECUTABLE}" -B
"${SAPI_SOURCE_DIR}/sandboxed_api/tools/generator2/sapi_generator.py"
"--sapi_name=${_sapi_LIBRARY_NAME}"
@ -160,8 +164,10 @@ function(add_sapi_library)
"--sapi_embed_name=${_sapi_embed_name}"
"--sapi_functions=${_sapi_funcs}"
"--sapi_ns=${_sapi_NAMESPACE}"
"--sapi_isystem=${_sapi_isystem}"
"--sapi_in=${_sapi_full_inputs}"
COMMENT "Generating interface"
VERBATIM
)
endif()

5
sandboxed_api/bazel/sapi.bzl
View File

@ -254,9 +254,8 @@ def sapi_library(
native.genrule(
name = name + ".isystem",
outs = [name + ".isystem.list"],
cmd = """echo |
$(CC) -E -x c++ - -v 2>&1 |
awk '/> search starts here:/{flag=1;next}/End of search/{flag=0}flag' > $@
cmd = """$(CC) -E -x c++ -v /dev/null 2>&1 |
awk '/> search starts here:/{f=1;next}/^End of search/{f=0}f{print $$1}' > $@
""",
toolchains = ["@bazel_tools//tools/cpp:current_cc_toolchain"],
)