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rules_foreign_cc
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Update README with information on how to correctly use rule (#23) 

fixes https://github.com/bazelbuild/rules_foreign_cc/issues/12
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irengrig 2018-08-13 15:18:14 +02:00 committed by GitHub
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.bazelrc
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@ -1 +1 @@
build --experimental_cc_skylark_api_enabled_packages=tools/build_defs
build --experimental_cc_skylark_api_enabled_packages=@rules_foreign_cc//tools/build_defs,tools/build_defs

28
README.md
View File

@ -12,7 +12,7 @@ Rules for building C/C++ projects using foreign build systems inside Bazel proje
It also requires passing Bazel the following flag:
```
--experimental_cc_skylark_api_enabled_packages=tools/build_defs
--experimental_cc_skylark_api_enabled_packages=@rules_foreign_cc//tools/build_defs,tools/build_defs
```
## building CMake projects:
@ -32,6 +32,22 @@ It also requires passing Bazel the following flag:
In `WORKSPACE`, put
```python
# -- Load CMake rule definition and its dependencies
http_archive(
name = "rules_foreign_cc",
strip_prefix = "rules_foreign_cc-master",
url = "https://github.com/bazelbuild/rules_foreign_cc/archive/master.zip",
)
load("@rules_foreign_cc//:workspace_definitions.bzl", "rules_foreign_cc_dependencies")
rules_foreign_cc_dependencies()
# -- Load the library
# Group the sources of the library so that CMake rule have access to it
all_content = """filegroup(name = "all", srcs = glob(["**"]), visibility = ["//visibility:public"])"""
new_http_archive(
name = "zlib",
build_file_content = all_content,
@ -50,9 +66,11 @@ load("//tools/build_defs:cmake.bzl", "cmake_external")
cmake_external(
name = "libz",
# Here we are referencing the library sources
lib_source = "@zlib//:all",
)
# Example to show that zlib was actually build
cc_binary(
name = "zlib_usage_example",
srcs = ["zlib-example.cpp"],
@ -63,7 +81,13 @@ cc_binary(
then build as usual:
```bash
$ devbazel build //:libevent_echosrv1
$ devbazel build //examples:zlib_usage_example
```
run to see that the zlib library was actually build and the example code can use it:
```bash
$ devbazel run //examples:zlib_usage_example
```
**cmake_external arguments:**