replaced imgui with cimgui shared lib to use with c# bindings

dependencies/cimgui.project.config

@@ -0,0 +1,104 @@
+#!/usr/bin/env bash
+CBUILD_VERSION=2.2.1
+CONFIG_VERSION=1
+
+PROJECT="cimgui"
+CMP_C="gcc"
+CMP_CPP="g++"
+STD_C="c11"
+STD_CPP="c++11"
+WARN_C="-Wall -Wno-discarded-qualifiers -Wno-unused-parameter"
+WARN_CPP="-Wall -Wno-unused-parameter"
+SRC_C=""
+SRC_CPP="imgui/imgui.cpp
+    imgui/imgui_demo.cpp
+    imgui/imgui_draw.cpp
+    imgui/imgui_tables.cpp
+    imgui/imgui_widgets.cpp
+    imgui/backends/imgui_impl_sdl2.cpp
+    imgui/backends/imgui_impl_sdlrenderer2.cpp
+    cimgui.cpp"
+
+# Directory with dependency configs.
+# See cbuild/example_dependency_configs
+DEPENDENCY_CONFIGS_DIR='dependencies'
+# List of dependency config files in DEPENDENCY_CONFIGS_DIR separated by space.
+ENABLED_DEPENDENCIES=''
+
+# OBJDIR structure:
+#  ├── objects/      - Compiled object files. Cleans on each call of build task
+#  ├── static_libs/  - Symbolic links to static libraries used by linker. Cleans on each call of build task.
+#  ├── static_libs/  - Symbolic links to dynamic libraries used by linker. Cleans on each call of build task.
+#  └── profile/      - gcc *.gcda profiling info files
+OBJDIR="../obj"
+OUTDIR="../bin"
+
+# header include directories
+INCLUDE="-I. -I./imgui -I../include/SDL2"
+
+STATIC_LIB_FILE="$PROJECT.a"
+# OS-specific options
+case "$OS" in
+    WINDOWS)
+        SHARED_LIB_FILE="$PROJECT.dll"
+        LINKER_LIBS="-L../precompiled/$OS-$ARCH -l:SDL2.dll"
+        DEFINE="-DIMGUI_API=__declspec(dllexport)"
+        ;;
+    LINUX)
+        SHARED_LIB_FILE="$PROJECT.so"
+        LINKER_LIBS="-lSDL2"
+        DEFINE="-DIMGUI_API=__attribute__((__visibility__(\"default\")))"
+        ;;
+    *)
+        error "operating system $OS has no configuration variants"
+        ;;
+esac
+
+# TASKS
+case "$TASK" in
+    # creates shared library
+    build_shared_lib)
+        C_ARGS="-O2 -fpic -shared $DEFINE"
+        CPP_ARGS="$C_ARGS"
+        LINKER_ARGS="$CPP_ARGS $LINKER_LIBS -Wl,-soname,$SHARED_LIB_FILE"
+        PRE_TASK_SCRIPT=
+        TASK_SCRIPT=cbuild/default_tasks/build_shared_lib.sh
+        POST_TASK_SCRIPT=
+        ;;
+    # creates shared library with debug symbols and no optimizations
+    build_shared_lib_dbg)
+        C_ARGS="-O0 -g3 -fpic -shared $DEFINE"
+        CPP_ARGS="$C_ARGS"
+        LINKER_ARGS="$CPP_ARGS $LINKER_LIBS -Wl,-soname,$SHARED_LIB_FILE"
+        PRE_TASK_SCRIPT=
+        TASK_SCRIPT=cbuild/default_tasks/build_shared_lib.sh
+        POST_TASK_SCRIPT=
+        ;;
+    # creates static library
+    build_static_lib)
+        C_ARGS="-O2 $DEFINE"
+        CPP_ARGS="$C_ARGS"
+        PRE_TASK_SCRIPT=
+        TASK_SCRIPT=cbuild/default_tasks/build_static_lib.sh
+        POST_TASK_SCRIPT=
+        ;;
+    # creates static library with debug symbols and no optimizations
+    build_static_lib_dbg)
+        C_ARGS="-O0 -g3 $DEFINE"
+        CPP_ARGS="$C_ARGS"
+        PRE_TASK_SCRIPT=
+        TASK_SCRIPT=cbuild/default_tasks/build_static_lib.sh
+        POST_TASK_SCRIPT=
+        ;;
+    # deletes generated files
+    clean)
+        TASK_SCRIPT=cbuild/default_tasks/clean.sh
+        ;;
+    # nothing to do
+    "" | no_task)
+        ;;
+    # unknown task
+    *)
+        error "task <$TASK> not found"
+    ;;
+esac