diff --git a/runtime/CMakeLists.txt b/runtime/CMakeLists.txt
index 32795da6..091d344b 100644
--- a/runtime/CMakeLists.txt
+++ b/runtime/CMakeLists.txt
@@ -78,6 +78,7 @@ file(GLOB_RECURSE DRUNTIME_D_GCSTUB ${RUNTIME_DIR}/src/gcstub/*.d)
 list(REMOVE_ITEM DRUNTIME_D ${DRUNTIME_D_GCSTUB})
 # remove some modules in rt/
 list(REMOVE_ITEM DRUNTIME_D
+    ${RUNTIME_DIR}/src/core/stdc/tgmath.d
     ${RUNTIME_DIR}/src/rt/alloca.d
     ${RUNTIME_DIR}/src/rt/deh.d
     ${RUNTIME_DIR}/src/rt/deh_win32.d
@@ -551,7 +551,9 @@ include(profile-rt/DefineBuildProfileRT.cmake)
 # Set up build and install targets
 #
 
-set(RT_CFLAGS "")
+set(RT_CFLAGS "@TERMUX_C_FLAGS@")
+set(CMAKE_C_COMPILER @TERMUX_C_COMPILER@)
+set(CMAKE_ASM_COMPILER ${CMAKE_C_COMPILER})
 
 if(APPLE AND MULTILIB)
     # On OS X, build "fat" libraries containing code for both architectures.