From: Ivan Grokhotkov <ivan@espressif.com>
Date: Thu, 22 Nov 2018 04:19:49 +0000 (+0800)
Subject: newlib: disable some optimizations for syscalls.c
X-Git-Tag: v3.3-beta1~82^2
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=8deb885ce3a19b3adef5cc706dca48fa77ad8b76;p=esp-idf

newlib: disable some optimizations for syscalls.c

Don’t allow the compiler to convert malloc + memset into calloc,
causing a recursive call in _calloc_r. Fixes crash when building with
-O2 optimization level.
---

diff --git a/components/newlib/CMakeLists.txt b/components/newlib/CMakeLists.txt
index a7b29c6548..d541b87bf2 100644
--- a/components/newlib/CMakeLists.txt
+++ b/components/newlib/CMakeLists.txt
@@ -30,3 +30,5 @@ register_component()
 
 target_link_libraries(newlib "-L ${CMAKE_CURRENT_SOURCE_DIR}/lib")
 target_link_libraries(newlib ${LIBC} ${LIBM})
+
+set_source_files_properties(syscalls.c PROPERTIES COMPILE_FLAGS -fno-builtin)
diff --git a/components/newlib/component.mk b/components/newlib/component.mk
index 05ef6bee8d..4db4acd00e 100644
--- a/components/newlib/component.mk
+++ b/components/newlib/component.mk
@@ -20,3 +20,5 @@ COMPONENT_ADD_LDFLAGS := $(LIBC_PATH) $(LIBM_PATH) -lnewlib
 COMPONENT_ADD_LINKER_DEPS := $(LIBC_PATH) $(LIBM_PATH)
 
 COMPONENT_ADD_INCLUDEDIRS := platform_include include
+
+syscalls.o: CFLAGS += -fno-builtin