CMake fixes for absl

Update to build with C++17, as absl is built in C++17 mode, and its
symbols include things like std::string_view.

Tweak CMake to force libbloaty as a static library and enable position
indepent code to resolve linking errors.

bloaty-1.1-absl.patch

@@ -1,7 +1,17 @@
 diff -up ./CMakeLists.txt.1 ./CMakeLists.txt
 --- ./CMakeLists.txt.1	2020-05-24 00:36:23.000000000 -0400
-+++ ./CMakeLists.txt	2020-05-26 21:06:16.035802108 -0400
-@@ -36,6 +36,8 @@ else(${PKG_CONFIG_FOUND})
++++ ./CMakeLists.txt	2020-12-19 12:32:29.021943521 -0500
+@@ -2,7 +2,8 @@ cmake_minimum_required(VERSION 3.5)
+ cmake_policy(SET CMP0048 NEW)
+ project (Bloaty VERSION 1.0)
+ project (Bloaty VERSION 1.1)
+-set(CMAKE_CXX_STANDARD 11)
++set(CMAKE_CXX_STANDARD 17)
++set(CMAKE_POSITION_INDEPENDENT_CODE ON)
+ 
+ # Options we define for users.
+ option(BLOATY_ENABLE_ASAN "Enable address sanitizer." OFF)
+@@ -36,6 +37,8 @@ else(${PKG_CONFIG_FOUND})
  endif(${PKG_CONFIG_FOUND})
  endif(UNIX)
  
@@ -10,7 +20,7 @@ diff -up ./CMakeLists.txt.1 ./CMakeLists.txt
  # Set default build type.
  if(NOT CMAKE_BUILD_TYPE)
    message(STATUS "Setting build type to 'RelWithDebInfo' as none was specified.")
-@@ -89,7 +91,6 @@ endif(UNIX)
+@@ -89,11 +92,10 @@ endif(UNIX)
  
  include_directories(.)
  include_directories(src)
@@ -18,7 +28,21 @@ diff -up ./CMakeLists.txt.1 ./CMakeLists.txt
  include_directories("${CMAKE_CURRENT_BINARY_DIR}/src")
  
  # Baseline build flags.
-@@ -159,6 +160,13 @@ add_library(libbloaty
+-set(CMAKE_CXX_FLAGS "-std=c++11 -W -Wall -Wno-sign-compare")
++set(CMAKE_CXX_FLAGS "-W -Wall -Wno-sign-compare")
+ set(CMAKE_CXX_FLAGS_DEBUG "-g1")
+ set(CMAKE_CXX_FLAGS_RELEASE "-O2")
+ set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "-O2 -g1")
+@@ -149,7 +151,7 @@ endif(${PROTOC_FOUND})
+ file(COPY ${CMAKE_CURRENT_SOURCE_DIR}/src/bloaty_package.bloaty
+      DESTINATION ${CMAKE_CURRENT_BINARY_DIR})
+ 
+-add_library(libbloaty
++add_library(libbloaty STATIC
+     src/bloaty.cc
+     src/demangle.cc
+     src/disassemble.cc
+@@ -159,6 +161,13 @@ add_library(libbloaty
      src/macho.cc
      src/range_map.cc
      src/webassembly.cc
@@ -32,7 +56,7 @@ diff -up ./CMakeLists.txt.1 ./CMakeLists.txt
      # Until Abseil has a proper CMake build system
      third_party/abseil-cpp/absl/base/internal/raw_logging.cc # Grrrr...
      third_party/abseil-cpp/absl/base/internal/throw_delegate.cc
-@@ -179,7 +187,8 @@ add_library(libbloaty
+@@ -179,7 +188,8 @@ add_library(libbloaty
      third_party/abseil-cpp/absl/types/bad_optional_access.cc
      # One source file, no special build system needed.
      third_party/demumble/third_party/libcxxabi/cxa_demangle.cpp
@@ -42,7 +66,7 @@ diff -up ./CMakeLists.txt.1 ./CMakeLists.txt
  
  if(UNIX)
    set(LIBBLOATY_LIBS libbloaty)
-@@ -249,9 +258,8 @@ else()
+@@ -249,9 +259,8 @@ else()
      enable_testing()
  
      if(BUILD_TESTING)
@@ -54,7 +78,7 @@ diff -up ./CMakeLists.txt.1 ./CMakeLists.txt
  
        set(TEST_TARGETS
            bloaty_test
-@@ -261,7 +269,7 @@ else()
+@@ -261,7 +270,7 @@ else()
  
        foreach(target ${TEST_TARGETS})
          add_executable(${target} tests/${target}.cc)

bloaty.spec

@@ -38,7 +38,6 @@ support for WebAssembly.
 %build
 %cmake \
   -DCMAKE_BUILD_TYPE=RelWithDebInfo \
-  -DBUILD_SHARED_LIBS=OFF \
   -DBLOATY_ENABLE_CMAKETARGETS=OFF \
   -DBUILD_TESTING=ON
 %cmake_build