提交 7bce40d7 编写于 作者: G gangliao 提交者: GitHub

Merge pull request #2538 from wangkuiyi/generic.cmake-comments

Rewrite tutorial comments in generic.cmake
......@@ -12,9 +12,11 @@
# See the License for the specific language governing permissions and
# limitations under the License.
#
# To simplify the build process of PaddlePaddle, we defined couple of
# fundamental abstractions, e.g., how to build library, binary and
# test in C++, CUDA and Go.
# generic.cmake defines CMakes functions that look like Bazel's
# building rules (https://bazel.build/).
#
#
# -------------------------------------------
# C++ CUDA C++ Go
......@@ -24,67 +26,57 @@
# cc_test nv_test go_test
# -------------------------------------------
#
# cmake_parse_arguments can help us to achieve this goal.
# https://cmake.org/cmake/help/v3.0/module/CMakeParseArguments.html
# To build a static library example.a from example.cc using the system
# compiler (like GCC):
#
# cc_library|nv_library(<target_name> [STATIC SHARED] SRCS <file>... DEPS <libs>...)
# cc_library(example SRCS example.cc)
#
# cc_library and nv_library can generate *.a, or *.so
# if the corresponding keyword STATIC or SHARED is specified.
# To build a static library example.a from multiple source files
# example{1,2,3}.cc:
#
# cc_binary|nv_binary(<target_name> SRCS <file>... DEPS <libs>...)
# cc_library(example SRCS example1.cc example2.cc example3.cc)
#
# cc_binary and nv_binary can build souce code and link the dependent
# libraries to generate a binary.
# To build a shared library example.so from example.cc:
#
# cc_test|nv_test(<target_name> SRCS <file>... DEPS <libs>...)
# cc_library(example SHARED SRCS example.cc)
#
# cc_test and nv_test can build test code, link gtest and other dependent
# libraries to generate test suite.
# To build a library using Nvidia's NVCC from .cu file(s), use the nv_
# prefixed version:
#
# For example, in one folder, it contains
# ddim{.h, .cc, _test.cc, _test.cu}
# place{.h, cc, _test.cc}
# nv_library(example SRCS example.cu)
#
# We can add build script as follows:
# To specify that a library new_example.a depends on other libraies:
#
# cc_library(place STATIC SRCS place.cc)
# cc_library(new_example SRCS new_example.cc DEPS example)
#
# place.cc -> place.a
# cc_library's STATIC OPTION will generate libplace.a.
# Static libraries can be composed of other static libraries:
#
# cc_test(place_test
# SRCS place_test.cc
# DEPS place glog gflags)
# cc_library(composed DEPS dependent1 dependent2 dependent3)
#
# place_test.cc, place, glog, gflags -> place_test
# cc_test will combine place_test.cc, libplace.a with libglog.a.
# and libgflags.a to generate place_test.
# To build an executable binary file from some source files and
# dependent libraries:
#
# cc_library(ddim STATIC SRCS ddim.cc)
# cc_binary(example SRCS main.cc something.cc DEPS example1 example2)
#
# ddim.cc -> ddim.a
# cc_library's STATIC OPTION will generate libddim.a.
# To build an executable binary file using NVCC, use the nv_ prefixed
# version:
#
# cc_test(ddim_test
# SRCS ddim_test.cc
# DEPS ddim)
# nv_binary(example SRCS main.cc something.cu DEPS example1 example2)
#
# ddim_test.cc, ddim.a -> ddim_test
# cc_test will build ddim_test.cc with libddim.a to generate ddim_test.
# To build a unit test binary, which is an executable binary with
# GoogleTest linked:
#
# nv_test(dim_test
# SRCS dim_test.cu
# DEPS ddim)
# cc_test(example_test SRCS example_test.cc DEPS example)
#
# dim_test.cu, ddim.a -> dim_test
# nv_test will build dim_test.cu with libddim.a to generate dim_test.
# To build a unit test binary using NVCC, use the nv_ prefixed version:
#
# cc_library(framework DEPS place ddim)
# nv_test(example_test SRCS example_test.cu DEPS example)
#
# place.a, ddim.a -> framework.a
# If no SRCS exists, merging libplace.a and libddim.a to generate libframework.a.
# It is pretty often that executable and test binaries depend on
# pre-defined external libaries like glog and gflags defined in
# /cmake/external/*.cmake:
#
# cc_test(example_test SRCS example_test.cc DEPS example glog gflags)
if(NOT APPLE)
find_package(Threads REQUIRED)
......
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