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Error even w/warnings disabled for no-return fcns (#8495)

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* Error even w/warnings disabled for no-return fcns

A function whose prototype says it will return a value but doesn't
is undefined behaviour in C++.  GCC 10 will generate code that crashes
in this case.

In warnings==None mode, insterad of turning off all warnings with
`-w`, explicitly list all G++ possible warnings except for the
`no-return` warning which catches this programming error.

* Use different lists for GCC vs G++

G++ and GCC have different warning options, so use different lists.

* Make separate file for each level, add readme

The readme now includes the exact commands required to regenerate the
none-XXX files, no manual editing needed.

* Address review comments, only adjusts G++/None
This commit is contained in:
Earle F. Philhower, III
2022-03-03 15:10:57 -08:00
committed by GitHub
parent ead5f94dd3
commit 46190b61f1
10 changed files with 77 additions and 8 deletions
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16
platform.txt
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@ -21,11 +21,11 @@ runtime.tools.mkdir={runtime.platform.path}/tools/mkdir.py
runtime.tools.cp={runtime.platform.path}/tools/cp.py
runtime.tools.eboot={runtime.platform.path}/bootloaders/eboot/eboot.elf
compiler.warning_flags=-w -Werror=return-type
compiler.warning_flags.none=-w -Werror=return-type
compiler.warning_flags.default=-Werror=return-type
compiler.warning_flags.more=-Wall -Werror=return-type
compiler.warning_flags.all=-Wall -Wextra -Werror=return-type
compiler.warning_flags=@{runtime.platform.path}/tools/warnings/none
compiler.warning_flags.none=@{runtime.platform.path}/tools/warnings/none
compiler.warning_flags.default=@{runtime.platform.path}/tools/warnings/default
compiler.warning_flags.more=@{runtime.platform.path}/tools/warnings/more
compiler.warning_flags.all=@{runtime.platform.path}/tools/warnings/extra
build.lwip_lib=-llwip_gcc
build.lwip_include=lwip/include
@ -68,18 +68,18 @@ compiler.cpreprocessor.flags=-D__ets__ -DICACHE_FLASH -U__STRICT_ANSI__ -D_GNU_S
compiler.libraries.ldflags=
compiler.c.cmd=xtensa-lx106-elf-gcc
compiler.c.flags=-c {compiler.warning_flags} -std=gnu17 {build.stacksmash_flags} -Os -g -free -fipa-pta -Wpointer-arith -Wno-implicit-function-declaration -Wl,-EL -fno-inline-functions -nostdlib -mlongcalls -mtext-section-literals -falign-functions=4 -MMD -ffunction-sections -fdata-sections {build.exception_flags} {build.sslflags} {build.mmuflags} {build.non32xferflags}
compiler.c.flags=-c {compiler.warning_flags}-gcc -std=gnu17 {build.stacksmash_flags} -Os -g -free -fipa-pta -Werror=return-type -Wpointer-arith -Wno-implicit-function-declaration -Wl,-EL -fno-inline-functions -nostdlib -mlongcalls -mtext-section-literals -falign-functions=4 -MMD -ffunction-sections -fdata-sections {build.exception_flags} {build.sslflags} {build.mmuflags} {build.non32xferflags}
compiler.S.cmd=xtensa-lx106-elf-gcc
compiler.S.flags=-c -g -x assembler-with-cpp -MMD -mlongcalls "-I{runtime.tools.xtensa-lx106-elf-gcc.path}/include/"
compiler.c.elf.flags=-g {compiler.warning_flags} -Os -nostdlib -Wl,--no-check-sections -u app_entry {build.float} -Wl,-static "-L{compiler.sdk.path}/lib" "-L{compiler.sdk.path}/lib/{build.sdk}" "-L{build.path}" "-L{compiler.libc.path}/lib" "-Tlocal.eagle.flash.ld" -Wl,--gc-sections -Wl,-wrap,system_restart_local -Wl,-wrap,spi_flash_read
compiler.c.elf.flags=-g {compiler.warning_flags}-gcc -Os -nostdlib -Wl,--no-check-sections -u app_entry {build.float} -Wl,-static "-L{compiler.sdk.path}/lib" "-L{compiler.sdk.path}/lib/{build.sdk}" "-L{build.path}" "-L{compiler.libc.path}/lib" "-Tlocal.eagle.flash.ld" -Wl,--gc-sections -Wl,-wrap,system_restart_local -Wl,-wrap,spi_flash_read
compiler.c.elf.cmd=xtensa-lx106-elf-gcc
compiler.c.elf.libs=-lhal -lphy -lpp -lnet80211 {build.lwip_lib} -lwpa -lcrypto -lmain -lwps -lbearssl -lespnow -lsmartconfig -lairkiss -lwpa2 {build.stdcpp_lib} -lm -lc -lgcc
compiler.cpp.cmd=xtensa-lx106-elf-g++
compiler.cpp.flags=-c {compiler.warning_flags} {build.stacksmash_flags} -Os -g -free -fipa-pta -mlongcalls -mtext-section-literals -fno-rtti -falign-functions=4 {build.stdcpp_level} -MMD -ffunction-sections -fdata-sections {build.exception_flags} {build.sslflags} {build.mmuflags} {build.non32xferflags}
compiler.cpp.flags=-c {compiler.warning_flags}-g++ {build.stacksmash_flags} -Os -g -free -fipa-pta -Werror=return-type -mlongcalls -mtext-section-literals -fno-rtti -falign-functions=4 {build.stdcpp_level} -MMD -ffunction-sections -fdata-sections {build.exception_flags} {build.sslflags} {build.mmuflags} {build.non32xferflags}
compiler.as.cmd=xtensa-lx106-elf-as