Compile database does not include force-included files #4293
Description
Issue Type: Bug
We have a codebase that is similar to Linux kernel in that it force-includes a specific header file with every file. This is reflected in the compile database as well:
{
"directory": "/home/anatoly/build/DPDK",
"command": "cc -Ilib/lib@@rte_eal@sta -Ilib -I../../DPDK/lib -I. -I../../DPDK/ -Iconfig -I../../DPDK/config -Ilib/librte_eal/common/include -I../../DPDK/lib/librte_eal/common/include -I../../DPDK/lib/librte_eal/linux/eal/include -Ilib/librte_eal/common -I../../DPDK/lib/librte_eal/common -Ilib/librte_eal/common/include/arch/x86 -I../../DPDK/lib/librte_eal/common/include/arch/x86 -Ilib/librte_eal -I../../DPDK/lib/librte_eal -Ilib/librte_kvargs -I../../DPDK/lib/librte_kvargs -fdiagnostics-color=always -pipe -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -O3 -include rte_config.h -Wunused-parameter -Wsign-compare -Wcast-qual -D_GNU_SOURCE -fPIC -march=native -mno-avx512f -Wno-format-truncation -DRTE_LIBEAL_USE_GETENTROPY -DALLOW_EXPERIMENTAL_API -MD -MQ 'lib/lib@@rte_eal@sta/librte_eal_linux_eal_eal_memory.c.o' -MF 'lib/lib@@rte_eal@sta/librte_eal_linux_eal_eal_memory.c.o.d' -o 'lib/lib@@rte_eal@sta/librte_eal_linux_eal_eal_memory.c.o' -c ../../DPDK/lib/librte_eal/linux/eal/eal_memory.c",
"file": "../../DPDK/lib/librte_eal/linux/eal/eal_memory.c"
},(note the -include rte_config.h in the command-line)
Yet, whenever i open the file, i get an error about pointers to incomplete type, because
- At the start of the file, there's an
#ifdefwhich conditionally includes certain system headers, and the preprocessor macro it depends on is defined inrte_config.h - Because
rte_config.his not included by the code analyzer, this macro is not defined, so the headers don't get included - Later, some headers end up including
rte_config.h, which defines the macro - Later in code, some code hidden behind the same
#ifdefis enabled, only this time the macro has been defined, but because of 2 the structure definitions are missing since they come from the would-be-included header
Contents of my c_cpp_properties.json:
{
"configurations": [
{
"name": "Linux",
"includePath": [
"${workspaceFolder}/../build/${workspaceFolderBasename}/",
"${workspaceFolder}/**"
],
"defines": [
"_GNU_SOURCE"
],
"compilerPath": "/usr/bin/gcc",
"cStandard": "c99",
"cppStandard": "c++17",
"intelliSenseMode": "${default}",
"forcedInclude": [
"${workspaceFolder}/config/rte_config.h"
],
"browse": {
"limitSymbolsToIncludedHeaders": false
},
"compileCommands": "/home/anatoly/build/DPDK/compile_commands.json"
}
],
"version": 4
}So, the C/C++ extension is configured to force-include that file with everything. If i remove the compileCommands, this issue is fixed. However, since compileCommands more accurately reflect how the files are built, it would be nice to have them fully working.
Extension version: 0.25.1
VS Code version: Code - Insiders 1.39.0-insider (575062278d181c075ea8dce345ab3d20a127309c, 2019-09-20T06:11:13.647Z)
OS version: Windows_NT x64 10.0.17763
Remote OS version: Linux x64 5.1.3-050103-generic