Error building imgui, C++11 macro '__GLIBC_USE' is not defined

[AnonimiAngels]

Build commands

mkdir -p build && cd build
cmake -S .. -GNinja -DCMAKE_BUILD_TYPE=Debug -DCMAKE_EXPORT_COMPILE_COMMANDS=ON \
	-DCMAKE_CXX_STANDARD=11 -DCMAKE_CXX_STANDARD_REQUIRED=ON -DCMAKE_CXX_EXTENSIONS=OFF \
	-DCMAKE_CXX_COMPILER=g++ -DCMAKE_C_COMPILER=gcc
ninja 

And this is the cmakefile

set(PROJECT_NAME imgui)
set(PROJECT_DIR ${CMAKE_CURRENT_SOURCE_DIR})
set(IS_LIBRARY ON)


cmake_minimum_required(VERSION 3.30)
project(${PROJECT_NAME})

set(SOURCES_DIRS "")
set(INCLUDE_DIRS "")

if (SYSTEM_TARGET STREQUAL "linux")
set(RENDERER "opengl3")
elseif(SYSTEM_TARGET STREQUAL "g640s")
set(RENDERER "opengl3")
elseif(SYSTEM_TARGET STREQUAL "a20")
set(RENDERER "sdl2")
endif()

list(APPEND SOURCES_DIRS ${PROJECT_DIR}/src/${RENDERER})
list(APPEND INCLUDE_DIRS ${PROJECT_DIR}/inc/${RENDERER})
list(APPEND SOURCES_DIRS ${PROJECT_DIR}/src/common_imgui)
list(APPEND INCLUDE_DIRS ${PROJECT_DIR}/inc/common_imgui)

foreach(dir ${SOURCES_DIRS})
file(GLOB_RECURSE PROJECT_SOURCES ${dir}/*.c*)
endforeach()

foreach(dir ${INCLUDE_DIRS})
file(GLOB_RECURSE PROJECT_HEADERS ${dir}/*.h*)
endforeach()

if (IS_LIBRARY)
	set(LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
	set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${LIBRARY_OUTPUT_DIRECTORY})
endif()

# list(APPEND PROJECT_LIBRARIES none)
list(APPEND PROJECT_LIB_INCLUDES ${INCLUDE_DIRS})

if (IS_LIBRARY)
	if (BUILD_SHARED_LIBS)
		add_library(${PROJECT_NAME} SHARED ${PROJECT_SOURCES} ${PROJECT_HEADERS})
	else()
		add_library(${PROJECT_NAME} STATIC ${PROJECT_SOURCES} ${PROJECT_HEADERS})
	endif()
else()
	add_executable(${PROJECT_NAME} ${PROJECT_SOURCES} ${PROJECT_HEADERS})
endif()

target_link_libraries(${PROJECT_NAME} ${PROJECT_LIBRARIES})
target_include_directories(${PROJECT_NAME} PUBLIC ${PROJECT_LIB_INCLUDES})

[AnonimiAngels]

After this all immediately collapses

[ocornut]

I'm not exactly sure what your problem is, but including <string.h> has been done for 40+ years.

If you cannot compile a source that simply contains:

#include <float.h>                  // FLT_MIN, FLT_MAX
#include <stdarg.h>                 // va_list, va_start, va_end
#include <stddef.h>                 // ptrdiff_t, NULL
#include <string.h>                 // memset, memmove, memcpy, strlen, strchr, strcpy, strcmp

Then you have an issue in your build setup that is not specific to dear imgui.

Try to narrow it down by e.g. creating such .cpp file, see if it build with your build script and/or with a manual command-line etc.

[AnonimiAngels]

Some of the included directories was a problem, the error is not related to imgui