Remove use of whole-archive (#677)

* Add source files wrapper library

Allow to not archive HAL/LL object files to core.a.
This avoid the linker to select weak definitions instead
of non-weak ones when 'whole-archive' option is not used.

See:
 http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.faqs/ka15833.html

* Remove use of whole-archive

* Move newlib syscall implementation outside core archive

Due to a bug in the arm none eabi gcc with lto which raise
an unresolved reference if syscall is in the archive (_sbrk,...)

Author: fpistm

libraries/SrcWrapper/keywords.txt

@@ -0,0 +1,15 @@
+#######################################
+# Syntax Coloring Map For SrcWrapper
+#######################################
+
+#######################################
+# Datatypes (KEYWORD1)
+#######################################
+
+#######################################
+# Methods and Functions (KEYWORD2)
+#######################################
+
+#######################################
+# Constants (LITERAL1)
+#######################################

libraries/SrcWrapper/library.properties

@@ -0,0 +1,9 @@
+name=Source Wrapper
+version=1.0.0
+author=Frederic Pillon
+maintainer=stm32duino
+sentence=Source files wrapper (HAL, LL,...)
+paragraph=Allow to not archive source object files to core.a. This avoid the linker to select weak definitions instead of non-weak ones when 'whole-archive' option is not used.
+category=Other
+url=
+architectures=stm32

cores/arduino/stm32/HAL/stm32yyxx_hal.c renamed to libraries/SrcWrapper/src/HAL/stm32yyxx_hal.c

@@ -0,0 +1,4 @@
+#ifndef __SRCWRAPPER_H__
+#define __SRCWRAPPER_H__
+
+#endif /* __SRCWRAPPER_H__ */

cores/arduino/stm32/HAL/stm32yyxx_hal_adc.c renamed to libraries/SrcWrapper/src/HAL/stm32yyxx_hal_adc.c

@@ -9,7 +9,7 @@ version=1.0.0
 
 # STM compile variables
 # ----------------------
-compiler.stm.extra_include="-I{build.source.path}" "-I{build.core.path}/avr" "-I{build.core.path}/stm32" "-I{build.core.path}/stm32/LL" "-I{build.core.path}/stm32/usb" "-I{build.core.path}/stm32/usb/hid" "-I{build.core.path}/stm32/usb/cdc" "-I{build.system.path}/Drivers/{build.series}_HAL_Driver/Inc/" "-I{build.system.path}/Drivers/{build.series}_HAL_Driver/Src/" "-I{build.system.path}/{build.series}/" "-I{build.system.path}/Middlewares/ST/STM32_USB_Device_Library/Core/Inc" "-I{build.system.path}/Middlewares/ST/STM32_USB_Device_Library/Core/Src"
+compiler.stm.extra_include="-I{build.source.path}" "-I{build.core.path}/avr" "-I{build.core.path}/stm32" "-I{build.core.path}/stm32/LL" "-I{build.core.path}/stm32/usb" "-I{build.core.path}/stm32/usb/hid" "-I{build.core.path}/stm32/usb/cdc" "-I{build.system.path}/Drivers/{build.series}_HAL_Driver/Inc" "-I{build.system.path}/Drivers/{build.series}_HAL_Driver/Src" "-I{build.system.path}/{build.series}" "-I{build.system.path}/Middlewares/ST/STM32_USB_Device_Library/Core/Inc" "-I{build.system.path}/Middlewares/ST/STM32_USB_Device_Library/Core/Src"
 
 compiler.warning_flags=-w
 compiler.warning_flags.none=-w
@@ -92,10 +92,22 @@ build.opt.name=build_opt.h
 build.opt.sourcepath={build.source.path}/{build.opt.name}
 build.opt.path={build.path}/sketch/{build.opt.name}
 
+build.src_wrapper.path={build.path}/sketch/SrcWrapper.cpp
+
+# Create sketch dir if not exists
+recipe.hooks.prebuild.1.pattern.windows=cmd /c if not exist "{build.path}\sketch" mkdir "{build.path}\sketch"
+recipe.hooks.prebuild.1.pattern.linux=bash -c "[ -f {build.path}/sketch ] || mkdir -p {build.path}/sketch"
+recipe.hooks.prebuild.1.pattern.macosx=bash -c "[ -f {build.path}/sketch ] || mkdir -p {build.path}/sketch"
+
 # Create empty {build.opt} if not exists in the sketch dir
-recipe.hooks.prebuild.1.pattern.windows=cmd /c if not exist "{build.opt.sourcepath}" mkdir "{build.path}\sketch" & type NUL > "{build.opt.path}"
-recipe.hooks.prebuild.1.pattern.linux=bash -c "[ -f {build.opt.sourcepath} ] || (mkdir -p {build.path}/sketch && touch {build.opt.path})"
-recipe.hooks.prebuild.1.pattern.macosx=bash -c "[ -f {build.opt.sourcepath} ] || (mkdir -p {build.path}/sketch && touch {build.opt.path})"
+recipe.hooks.prebuild.2.pattern.windows=cmd /c if not exist "{build.opt.sourcepath}" type NUL > "{build.opt.path}"
+recipe.hooks.prebuild.2.pattern.linux=bash -c "[ -f {build.opt.sourcepath} ] || touch {build.opt.path}"
+recipe.hooks.prebuild.2.pattern.macosx=bash -c "[ -f {build.opt.sourcepath} ] || touch {build.opt.path}"
+
+# Force include of SrcWrapper library
+recipe.hooks.prebuild.3.pattern.windows=cmd /c echo #include ^<SrcWrapper.h^> > "{build.src_wrapper.path}"
+recipe.hooks.prebuild.3.pattern.linux=bash -c "echo $0 > {build.src_wrapper.path}" "#include <SrcWrapper.h>"
+recipe.hooks.prebuild.3.pattern.macosx=bash -c "echo $0 > {build.src_wrapper.path}" "#include <SrcWrapper.h>"
 
 # compile patterns
 # ---------------------
@@ -113,7 +125,7 @@ recipe.S.o.pattern="{compiler.path}{compiler.S.cmd}" {compiler.S.flags} {build.i
 recipe.ar.pattern="{compiler.path}{compiler.ar.cmd}" {compiler.ar.flags} {compiler.ar.extra_flags} "{archive_file_path}" "{object_file}"
 
 ## Combine gc-sections, archives, and objects
-recipe.c.combine.pattern="{compiler.path}{compiler.c.elf.cmd}" {compiler.c.elf.flags} "-T{build.variant.path}/{build.ldscript}" "-Wl,-Map,{build.path}/{build.project_name}.map" {compiler.c.elf.extra_flags} {compiler.ldflags} {compiler.arm.cmsis.ldflags} -o "{build.path}/{build.project_name}.elf" "-L{build.path}" -Wl,--start-group {object_files} -Wl,--whole-archive "{archive_file_path}" -Wl,--no-whole-archive -lc -Wl,--end-group -lm -lgcc -lstdc++
+recipe.c.combine.pattern="{compiler.path}{compiler.c.elf.cmd}" {compiler.c.elf.flags} "-T{build.variant.path}/{build.ldscript}" "-Wl,-Map,{build.path}/{build.project_name}.map" {compiler.c.elf.extra_flags} {compiler.ldflags} {compiler.arm.cmsis.ldflags} -o "{build.path}/{build.project_name}.elf" "-L{build.path}" -Wl,--start-group {object_files} "{archive_file_path}" -lc -Wl,--end-group -lm -lgcc -lstdc++
 
 ## Create output (.bin file)
 recipe.objcopy.bin.pattern="{compiler.path}{compiler.objcopy.cmd}" {compiler.elf2bin.flags} {compiler.elf2bin.extra_flags} "{build.path}/{build.project_name}.elf" "{build.path}/{build.project_name}.bin"