Export of internal Abseil changes

--
d09230db053c544c2dc7fd7d95d1ebe4302071e9 by Abseil Team <absl-team@google.com>:

Move testonly_uses_linear_node_search to BtreeNodePeer

PiperOrigin-RevId: 338210523

--
7b11c945dbba7a354103c194877eba240f7f0cbc by Derek Mauro <dmauro@google.com>:

Allow pinning to a GoogleTest commit to make the build reproducible
Allow using a cached copy of the commit to avoid depending on GitHub

PiperOrigin-RevId: 338115715

--
8414f496c570a6398744da8324e158b39a2e3d92 by Andy Getzendanner <durandal@google.com>:

Generate a pkg-config file per absl_cc_library.

PiperOrigin-RevId: 337986219
GitOrigin-RevId: d09230db053c544c2dc7fd7d95d1ebe4302071e9
Change-Id: Iae398ab8ad5c0c6833abd01aa5198315f5b6fa99

3 files changed, 66 insertions, 21 deletions

diff --git a/CMake/AbseilHelpers.cmake b/CMake/AbseilHelpers.cmake
index 8b2925c5..e63db3a8 100644
--- a/CMake/AbseilHelpers.cmake
+++ b/CMake/AbseilHelpers.cmake
@@ -137,6 +137,45 @@ function(absl_cc_library)
     set(_build_type "static")
   endif()
 
+  # Generate a pkg-config file for every library:
+  if(${_build_type} STREQUAL "static" OR ${_build_type} STREQUAL "shared")
+    if(NOT ABSL_CC_LIB_TESTONLY)
+      if(absl_VERSION)
+        set(PC_VERSION "${absl_VERSION}")
+      else()
+        set(PC_VERSION "head")
+      endif()
+      foreach(dep ${ABSL_CC_LIB_DEPS})
+        if(${dep} MATCHES "^absl::(.*)")
+          set(PC_DEPS "${PC_DEPS} absl_${CMAKE_MATCH_1} = ${PC_VERSION}")
+        endif()
+      endforeach()
+      foreach(cflag ${ABSL_CC_LIB_COPTS})
+        if(${cflag} MATCHES "^(-Wno|/wd)")
+          # These flags are needed to suppress warnings that might fire in our headers.
+          set(PC_CFLAGS "${PC_CFLAGS} ${cflag}")
+        elseif(${cflag} MATCHES "^(-W|/w[1234eo])")
+          # Don't impose our warnings on others.
+        else()
+          set(PC_CFLAGS "${PC_CFLAGS} ${cflag}")
+        endif()
+      endforeach()
+      FILE(GENERATE OUTPUT "${CMAKE_INSTALL_PREFIX}/lib/pkgconfig/absl_${_NAME}.pc" CONTENT "\
+prefix=${CMAKE_INSTALL_PREFIX}\n\
+exec_prefix=\${prefix}\n\
+libdir=\${prefix}/lib\n\
+includedir=\${prefix}/include\n\
+\n\
+Name: absl_${_NAME}\n\
+Description: Abseil ${_NAME} library\n\
+URL: https://abseil.io/\n\
+Version: ${PC_VERSION}\n\
+Requires.private:${PC_DEPS}\n\
+Libs: -L\${libdir} $<JOIN:${ABSL_CC_LIB_LINKOPTS}, > $<$<NOT:$<BOOL:${ABSL_CC_LIB_IS_INTERFACE}>>:-labsl_${_NAME}>\n\
+Cflags: -I\${includedir}${PC_CFLAGS}\n")
+    endif()
+  endif()
+
   if(NOT ABSL_CC_LIB_IS_INTERFACE)
     if(${_build_type} STREQUAL "dll_dep")
       # This target depends on the DLL. When adding dependencies to this target,
diff --git a/CMake/Googletest/CMakeLists.txt.in b/CMake/Googletest/CMakeLists.txt.in
index 994dac0b..5769e3a9 100644
--- a/CMake/Googletest/CMakeLists.txt.in
+++ b/CMake/Googletest/CMakeLists.txt.in
@@ -3,24 +3,12 @@ cmake_minimum_required(VERSION 2.8.2)
 project(googletest-external NONE)
 
 include(ExternalProject)
-if(${ABSL_USE_GOOGLETEST_HEAD})
-  ExternalProject_Add(googletest
-    GIT_REPOSITORY    https://github.com/google/googletest.git
-    GIT_TAG           master
-    SOURCE_DIR        "${absl_gtest_src_dir}"
-    BINARY_DIR        "${absl_gtest_build_dir}"
-    CONFIGURE_COMMAND ""
-    BUILD_COMMAND     ""
-    INSTALL_COMMAND   ""
-    TEST_COMMAND      ""
-  )
-else()
-  ExternalProject_Add(googletest
-    SOURCE_DIR        "${absl_gtest_src_dir}"
-    BINARY_DIR        "${absl_gtest_build_dir}"
-    CONFIGURE_COMMAND ""
-    BUILD_COMMAND     ""
-    INSTALL_COMMAND   ""
-    TEST_COMMAND      ""
-  )
-endif()
\ No newline at end of file
+ExternalProject_Add(googletest
+  URL               "${absl_gtest_download_url}"  # May be empty
+  SOURCE_DIR        "${absl_gtest_src_dir}"
+  BINARY_DIR        "${absl_gtest_build_dir}"
+  CONFIGURE_COMMAND ""
+  BUILD_COMMAND     ""
+  INSTALL_COMMAND   ""
+  TEST_COMMAND      ""
+)
diff --git a/CMake/install_test_project/test.sh b/CMake/install_test_project/test.sh
index 99989b03..ddc7726b 100755
--- a/CMake/install_test_project/test.sh
+++ b/CMake/install_test_project/test.sh
@@ -118,6 +118,24 @@ if ! grep absl::strings "${libdir}/cmake/${absl_subdir}/abslTargets.cmake"; then
   exit 1
 fi
 
+pushd "${HOME}"
+cat > hello-abseil.cc << EOF
+#include <cstdlib>
+
+#include "absl/strings/str_format.h"
+
+int main(int argc, char **argv) {
+  absl::PrintF("Hello Abseil!\n");
+  return EXIT_SUCCESS;
+}
+EOF
+export PKG_CONFIG_PATH="${install_dir}/${libdir}/pkgconfig"
+pc_args=($(pkg-config --cflags --libs --static absl_str_format))
+g++ -static -o hello-abseil hello-abseil.cc "${pc_args[@]}"
+hello="$(./hello-abseil)"
+[[ "${hello}" == "Hello Abseil!" ]]
+popd
+
 uninstall_absl
 popd