tree e782a0f721daa39de2b2a5e115e7de369b589fd3
parent 65ede0a387bb3aab32634e9e840b8b4955bc1e1c
author Aaron Bray <aaron.bray@kitware.com> 1721075086 -0700
committer Copybara-Service <copybara-worker@google.com> 1721075122 -0700

PR #1699: Add option to build with MSVC static runtime

Imported from GitHub PR https://github.com/abseil/abseil-cpp/pull/1699

The correct CMake policy is set, but there is no option to switch the msvc runtime when configuring the project.

Since MSVC is a multiconfiguration build tool, we need to set this CMake variable internal to the project to ensure that all of the supported build configurations get properly set (i.e. `Release` builds use `/MT` or `/MD` and `Debug` builds use `/MTd` or `/MDd`).
I tried to explictly set these flags (i.e. -DCMAKE_CXX_FLAGS_XXX) when configuring the project, but these flags were being overwritten due to [explicitly setting compiler flags](https://github.com/abseil/abseil-cpp/blob/master/CMake/AbseilHelpers.cmake#L285).

Merge 4fbe3ae4695621c85fd328d4977e0392a614dac4 into b86d574c5a8ca3344d02c312a63cebb49deeacfc

Merging this change closes #1699

COPYBARA_INTEGRATE_REVIEW=https://github.com/abseil/abseil-cpp/pull/1699 from aaron-bray:msvc_runtime_library 4fbe3ae4695621c85fd328d4977e0392a614dac4
PiperOrigin-RevId: 652581337
Change-Id: I64b24127cda68b681a1cd327052150508df2c4a0