Some problematic compiler warnings in leon/

[jengelh]

cd src/leon; CFLAGS="-O2 -Wall -Werror=return-type" make
./src/cuprstab.c: In function ‘uPartnStabRefine’:
./src/cuprstab.c:304:1: error: no return statement in function returning non-void [-Werror=return-type]
  304 | }
      | ^
./src/cuprstab.c: In function ‘PaStbR’:
./src/cuprstab.c:495:1: error: no return statement in function returning non-void [-Werror=return-type]
  495 | }
./src/cuprstab.c: In function ‘UprStb’:
./src/cuprstab.c:128:1: error: control reaches end of non-void function [-Werror=return-type]
  128 | }
      | ^
./src/cuprstab.c: In function ‘UPrImg’:
./src/cuprstab.c:186:1: error: control reaches end of non-void function [-Werror=return-type]
  186 | }

[dimpase]

What C/C++ compiler are you using, on what OS?

[jengelh]

$ cat /etc/os-release
NAME="openSUSE Tumbleweed"
# VERSION="20221015"
ID="opensuse-tumbleweed"
ID_LIKE="opensuse suse"
VERSION_ID="20221015"
PRETTY_NAME="openSUSE Tumbleweed"
ANSI_COLOR="0;32"
CPE_NAME="cpe:/o:opensuse:tumbleweed:20221015"
BUG_REPORT_URL="https://bugs.opensuse.org"
HOME_URL="https://www.opensuse.org/"
DOCUMENTATION_URL="https://en.opensuse.org/Portal:Tumbleweed"
LOGO="distributor-logo-Tumbleweed"

gcc -v
Using built-in specs.
Reading specs from /usr/lib64/gcc/x86_64-suse-linux/12/defaults.spec
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib64/gcc/x86_64-suse-linux/12/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none:amdgcn-amdhsa
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-suse-linux
Configured with: ../configure --prefix=/usr --infodir=/usr/share/info --mandir=/usr/share/man --libdir=/usr/lib64 --libexecdir=/usr/lib64 --enable-languages=c,c++,objc,fortran,obj-c++,ada,go,d,jit --enable-offload-targets=nvptx-none,amdgcn-amdhsa, --enable-offload-defaulted --without-cuda-driver --enable-host-shared --enable-checking=release --disable-werror --with-gxx-include-dir=/usr/include/c++/12 --enable-ssp --disable-libssp --disable-libvtv --enable-cet=auto --disable-libcc1 --enable-plugin --with-bugurl=https://bugs.opensuse.org/ --with-pkgversion='SUSE Linux' --with-slibdir=/lib64 --with-system-zlib --enable-libstdcxx-allocator=new --disable-libstdcxx-pch --enable-libphobos --enable-version-specific-runtime-libs --with-gcc-major-version-only --enable-linker-build-id --enable-linux-futex --enable-gnu-indirect-function --program-suffix=-12 --without-system-libunwind --enable-multilib --with-arch-32=x86-64 --with-tune=generic --with-build-config=bootstrap-lto-lean --enable-link-mutex --build=x86_64-suse-linux --host=x86_64-suse-linux
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 12.2.1 20220830 [revision e927d1cf141f221c5a32574bde0913307e140984] (SUSE Linux) 

[osj1961]

I notice that the warnings seem to be only related to functions whose entire content is enclosed in #ifdef #endif directives. But they all do seem to return something...

[dimpase]

The thing is that #ifdef block contains all the returns. If #ifdef's stuff is not included that the whole function body is just { }, no returns. Hence the error.