[llvm-bugs] [Bug 49247] New: Include file not found when file is passed with define option in clang tooling

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=49247

            Bug ID: 49247
           Summary: Include file not found when file is passed with define
                    option in clang tooling
           Product: clang
           Version: 10.0
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Tooling
          Assignee: unassignedclangbugs at nondot.org
          Reporter: vad.e.volodin at gmail.com
                CC: llvm-bugs at lists.llvm.org

Clang tooling says that include file not found, however running command in
terminal gives positive result.

file.c:
#include "stdio.h"
#include THE_INCLUDE

int main() {
        printf("%d\n", f(5));
}

file.h:
int f(int a) {
        return a + 1;
}

compile_commands.json:
[
    {
        "arguments": [
            "clang",
            "-c",
            "-o",
            "file.o",
            "-DTHE_INCLUDE=\"\\\"file.h\\\"\"",
            "file.c"
        ],
        "directory": "/home/utbot/work/tmp",
        "file": "file.c"
    }
]

Output of clang tooling:
clang -c -o file.o -DTHE_INCLUDE="\"file.h\"" file.c 
file.c:3:10: error: '\"file.h\"' file not found, did you mean 'file.h'?
#include THE_INCLUDE
         ^
<command line>:1:21: note: expanded from here
#define THE_INCLUDE "\"file.h\""
                    ^
1 error generated.
Error while processing /home/utbot/work/tmp/file.c.

Note that this command runs ok in terminal:
clang -c -o file.o -DTHE_INCLUDE="\"file.h\"" file.c 

Also tooling code:
#include <clang/ASTMatchers/ASTMatchFinder.h>
#include <clang/Frontend/FrontendActions.h>
#include <clang/Tooling/CommonOptionsParser.h>
#include <clang/Tooling/Tooling.h>

#include <string>
#include <vector>
#include <memory>
#include <iostream>

int main() {
    clang::ast_matchers::MatchFinder finder;
    std::string errMsg;
    std::shared_ptr<clang::tooling::CompilationDatabase> cDb =
clang::tooling::CompilationDatabase::autoDetectFromDirectory("/home/utbot/work/tmp",
errMsg);
    std::cout << errMsg; // No output
    for (auto command: cDb->getAllCompileCommands()) {
        for (auto option: command.CommandLine) {
            std::cout << option << ' ';
        }
        std::cout << std::endl;
    }
    auto clangTool = std::make_unique<clang::tooling::ClangTool>(*cDb,
std::vector<std::string>({"/home/utbot/work/tmp/file.c"}));
    clangTool->run(clang::tooling::newFrontendActionFactory(&finder).get());
}

cmake for tooling code:
cmake_minimum_required(VERSION 3.16)
project(untitled)

set(CMAKE_CXX_STANDARD 17)

set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -O0 -g -fstandalone-debug
-fno-discard-value-names -fno-elide-constructors")


find_package(Clang REQUIRED)
include_directories(${CLANG_INCLUDE_DIRS})
add_definitions(${CLANG_DEFINITIONS})

add_executable(clang_error main.cpp)
target_link_libraries(clang_error PUBLIC clangTooling clangBasic
clangASTMatchers)


Using clang 10.0.0

-- 
You are receiving this mail because:
You are on the CC list for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-bugs/attachments/20210218/80988fd2/attachment.html>