Building package expat:x64-osx failed with: BUILD_FAILED

[WilliamZkl]

Describe the bug
Building package expat:x64-osx failed with: BUILD_FAILED
Package: expat:x64-osx
Vcpkg version: 2020.11.12-unknownhash

Environment

• OS: macOS
• Compiler: C

To Reproduce
Steps to reproduce the behavior:

1. ./vcpkg install readosm
2. See error
   CMake Error at scripts/cmake/vcpkg_find_acquire_program.cmake:533 (message):
   Could not find pkg-config. Please install it via your package manager:
   brew install pkg-config
   Call Stack (most recent call first):
   scripts/cmake/vcpkg_fixup_pkgconfig.cmake:272 (vcpkg_find_acquire_program)
   ports/expat/portfile.cmake:30 (vcpkg_fixup_pkgconfig)
   scripts/ports.cmake:136 (include)

Error: Building package expat:x64-osx failed with: BUILD_FAILED
Please ensure you're using the latest portfiles with ./vcpkg update, then
submit an issue at https://github.com/Microsoft/vcpkg/issues including:
Package: expat:x64-osx
Vcpkg version: 2020.11.12-unknownhash
Additionally, attach any relevant sections from the log files above.

Expected behavior
I hope to see the solutions to solve this error and build the package expat:x64-osx successfully.

Failure logs
Error: Building package expat:x64-osx failed with: BUILD_FAILED
Please ensure you're using the latest portfiles with ./vcpkg update, then
submit an issue at https://github.com/Microsoft/vcpkg/issues including:
Package: expat:x64-osx
Vcpkg version: 2020.11.12-unknownhash
Additionally, attach any relevant sections from the log files above.

Additional context
I want to use the Vcpkg to install the 'readosm' for Visual Studio Code because the includepath doesn't include <dos.h>.

[Hoikas]

Could not find pkg-config. Please install it via your package manager:
brew install pkg-config

[JonLiu1993]

@WilliamZkl ,Please install pkg-config first, make sure vcpkg is the latest version, and then rebuild

[longhuan2018]

If you want to use readosm in osx, you can try this PR #14951

[PhoebeHui]

@WilliamZkl, please reopen this issue if it still be a problem for you.