Commits
Kouhei Sutou authored 24a98e4cab4
ARROW-4599: [C++] Add support for system GFlags This is needed to build tests with MinGW. Author: Kouhei Sutou <kou@clear-code.com> Author: Wes McKinney <wesm+git@apache.org> Closes #3675 from kou/cpp-system-gflags and squashes the following commits: 38f910f8 <Wes McKinney> Fix rebase artifact 2caf588d <Kouhei Sutou> Define GFLAGS_IS_A_DLL by target 0f43fc9b <Kouhei Sutou> Don't use vendored GFlags when GFLAGS_HOME is specified ca0f67c5 <Kouhei Sutou> Remove build directory entirely before new configuration build 9516d2f9 <Kouhei Sutou> GFLAGS_STATIC isn't defined by CONFIG mode 34cb1a62 <Kouhei Sutou> Add support for system GFlags