Merge pull request #2694 from particle-iot/feature/printf-i-long-long

[services] add long long support to printf/scanf
particle-iot · Sep 19, 2023 · e556939 · e556939
1 parent ba32c48
commit e556939
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Showing 8 changed files with 1,306 additions and 2 deletions.
diff --git a/build/arm-tools.mk b/build/arm-tools.mk
@@ -9,6 +9,12 @@ include $(COMMON_BUILD)/common-tools.mk
 
 AR = $(GCC_ARM_PATH)$(GCC_PREFIX)gcc-ar
 
+# Newlib has a bug in fake stdin/stdout/stderr implementation and leaks memory
+# Stub printf/fprintf out, override printf/scanf for 64-bit int/unsigned support
+CFLAGS += -fno-builtin-puts -fno-builtin-printf -Wl,--wrap=puts -Wl,--wrap=printf
+CFLAGS += -Wl,--wrap=_printf_i -Wl,--wrap=_svfprintf_r
+CFLAGS += -Wl,--wrap=_scanf_i -Wl,--wrap=__ssvfscanf_r
+
 #
 # default flags for targeting ARM Cortex-M3
 #
@@ -55,8 +61,6 @@ endif
 #
 # -fno-use-cxa-atexit makes sure that destructors for statically created C++ objects are never called,
 # which saves us some flash space.
-CPPFLAGS += -flto -ffat-lto-objects -DPARTICLE_COMPILE_LTO_FAT -fno-use-cxa-atexit
-CONLYFLAGS += -flto -ffat-lto-objects -DPARTICLE_COMPILE_LTO_FAT
 LDFLAGS += -fno-use-cxa-atexit
 
 ifeq ($(COMPILE_LTO),y)