From 879599b65337d6e7ddb71795dd5d9aadc9677a12 Mon Sep 17 00:00:00 2001
From: Ehsan Saei <71217171+esigo@users.noreply.github.com>
Date: Sat, 1 Jul 2023 12:47:13 +0200
Subject: [PATCH] Add Include what you use

---
 api/include/opentelemetry/version.h             |  1 -
 ci/do_ci.sh                                     | 12 ++++++++----
 ci/setup_ci_environment.sh                      |  3 ++-
 sdk/include/opentelemetry/sdk/version/version.h |  2 --
 4 files changed, 10 insertions(+), 8 deletions(-)

diff --git a/api/include/opentelemetry/version.h b/api/include/opentelemetry/version.h
index 2178591728..5fcde42541 100644
--- a/api/include/opentelemetry/version.h
+++ b/api/include/opentelemetry/version.h
@@ -4,7 +4,6 @@
 #pragma once
 
 #include "opentelemetry/common/macros.h"
-#include "opentelemetry/detail/preprocessor.h"
 
 #define OPENTELEMETRY_ABI_VERSION_NO 1
 #define OPENTELEMETRY_VERSION "1.9.1"
diff --git a/ci/do_ci.sh b/ci/do_ci.sh
index 6020d22a04..8c4e811c0b 100755
--- a/ci/do_ci.sh
+++ b/ci/do_ci.sh
@@ -109,8 +109,9 @@ elif [[ "$1" == "cmake.maintainer.sync.test" ]]; then
         -DWITH_ASYNC_EXPORT_PREVIEW=OFF \
         -DOTELCPP_MAINTAINER_MODE=ON \
         -DWITH_NO_DEPRECATED_CODE=ON \
+        -DCMAKE_CXX_INCLUDE_WHAT_YOU_USE="iwyu" \
         "${SRC_DIR}"
-  make -k
+  make -k CXX=include-what-you-use CXXFLAGS="-Xiwyu --error_always"
   make test
   exit 0
 elif [[ "$1" == "cmake.maintainer.async.test" ]]; then
@@ -132,8 +133,9 @@ elif [[ "$1" == "cmake.maintainer.async.test" ]]; then
         -DWITH_ASYNC_EXPORT_PREVIEW=ON \
         -DOTELCPP_MAINTAINER_MODE=ON \
         -DWITH_NO_DEPRECATED_CODE=ON \
+        -DCMAKE_CXX_INCLUDE_WHAT_YOU_USE="iwyu" \
         "${SRC_DIR}"
-  make -k -j $(nproc)
+  make -k CXX=include-what-you-use CXXFLAGS="-Xiwyu --error_always" -j $(nproc)
   make test
   exit 0
 elif [[ "$1" == "cmake.maintainer.cpp11.async.test" ]]; then
@@ -206,8 +208,9 @@ elif [[ "$1" == "cmake.c++20.test" ]]; then
         -DCMAKE_CXX_FLAGS="-Werror $CXXFLAGS" \
         -DWITH_ASYNC_EXPORT_PREVIEW=ON \
         -DCMAKE_CXX_STANDARD=20 \
+        -DCMAKE_CXX_INCLUDE_WHAT_YOU_USE="iwyu" \
         "${SRC_DIR}"
-  make -j $(nproc)
+  make -k CXX=include-what-you-use CXXFLAGS="-Xiwyu --error_always" -j $(nproc)
   make test
   exit 0
 elif [[ "$1" == "cmake.c++20.stl.test" ]]; then
@@ -219,8 +222,9 @@ elif [[ "$1" == "cmake.c++20.stl.test" ]]; then
         -DCMAKE_CXX_FLAGS="-Werror $CXXFLAGS" \
         -DWITH_ASYNC_EXPORT_PREVIEW=ON \
         -DWITH_STL=ON \
+        -DCMAKE_CXX_INCLUDE_WHAT_YOU_USE="iwyu" \
         "${SRC_DIR}"
-  make -j $(nproc)
+  make -k CXX=include-what-you-use CXXFLAGS="-Xiwyu --error_always" -j $(nproc)
   make test
   exit 0
 elif [[ "$1" == "cmake.legacy.test" ]]; then
diff --git a/ci/setup_ci_environment.sh b/ci/setup_ci_environment.sh
index f995ed75b5..8e93b8d5b5 100755
--- a/ci/setup_ci_environment.sh
+++ b/ci/setup_ci_environment.sh
@@ -11,4 +11,5 @@ apt-get install --no-install-recommends --no-install-suggests -y \
                 wget \
                 git \
                 valgrind \
-                lcov
+                lcov \
+                iwyu
diff --git a/sdk/include/opentelemetry/sdk/version/version.h b/sdk/include/opentelemetry/sdk/version/version.h
index 1c9c285f90..83cfce9cb3 100644
--- a/sdk/include/opentelemetry/sdk/version/version.h
+++ b/sdk/include/opentelemetry/sdk/version/version.h
@@ -3,8 +3,6 @@
 
 #pragma once
 
-#include "opentelemetry/detail/preprocessor.h"
-
 #define OPENTELEMETRY_SDK_VERSION "1.9.1"
 
 #include "opentelemetry/version.h"