https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109814
--- Comment #5 from lesto fante <lestofante88 at gmail dot com> --- > Presumably you're using newlib to provide the libm functions that <cmath> > declares? newlib-nano, trough the "-specs=nano.specs". Removing -ffreestanding in my project caused a decrease(!) in code size (42008 vs 41328), but an increase of max function stack usage (better inlining?) > If people are using more than just <cmath> with -ffreestanding then things > get harder I personally like this breakage, i would have never known this build script had this error if i would have never used with this compiler version, so big plus for me. Maybe a warning instead of an error? I looked a bit online and it seems to be relatively common, considering how hard can be finding stuff about linking in embedded. Even ST's IDE * seems to be doing it, and if this is default, that means a lot of people like me are just using forbitten lib in freestanding without realizing :( (* https://community.st.com/s/question/0D50X0000AkShGlSQK/cannot-compile-release-configuration-no-rule-to-make-syscallso) ---- arm-none-eabi-gcc -v Using built-in specs. COLLECT_GCC=arm-none-eabi-gcc COLLECT_LTO_WRAPPER=/usr/lib/gcc/arm-none-eabi/13.1.0/lto-wrapper Target: arm-none-eabi Configured with: /build/arm-none-eabi-gcc/src/gcc-13.1.0/configure --target=arm-none-eabi --prefix=/usr --with-sysroot=/usr/arm-none-eabi --with-native-system-header-dir=/include --libexecdir=/usr/lib --enable-languages=c,c++ --enable-plugins --disable-decimal-float --disable-libffi --disable-libgomp --disable-libmudflap --disable-libquadmath --disable-libssp --disable-libstdcxx-pch --disable-nls --disable-shared --disable-threads --disable-tls --with-gnu-as --with-gnu-ld --with-system-zlib --with-newlib --with-headers=/usr/arm-none-eabi/include --with-python-dir=share/gcc-arm-none-eabi --with-gmp --with-mpfr --with-mpc --with-isl --with-libelf --enable-gnu-indirect-function --with-host-libstdcxx='-static-libgcc -Wl,-Bstatic,-lstdc++,-Bdynamic -lm' --with-pkgversion='Arch Repository' --with-bugurl=https://bugs.archlinux.org/ --with-multilib-list=rmprofile Thread model: single Supported LTO compression algorithms: zlib zstd gcc version 13.1.0 (Arch Repository) ---- arm-none-eabi-gcc -v Using built-in specs. COLLECT_GCC=arm-none-eabi-gcc COLLECT_LTO_WRAPPER=/usr/lib/gcc/arm-none-eabi/12.2.0/lto-wrapper Target: arm-none-eabi Configured with: /build/arm-none-eabi-gcc/src/gcc-12.2.0/configure --target=arm-none-eabi --prefix=/usr --with-sysroot=/usr/arm-none-eabi --with-native-system-header-dir=/include --libexecdir=/usr/lib --enable-languages=c,c++ --enable-plugins --disable-decimal-float --disable-libffi --disable-libgomp --disable-libmudflap --disable-libquadmath --disable-libssp --disable-libstdcxx-pch --disable-nls --disable-shared --disable-threads --disable-tls --with-gnu-as --with-gnu-ld --with-system-zlib --with-newlib --with-headers=/usr/arm-none-eabi/include --with-python-dir=share/gcc-arm-none-eabi --with-gmp --with-mpfr --with-mpc --with-isl --with-libelf --enable-gnu-indirect-function --with-host-libstdcxx='-static-libgcc -Wl,-Bstatic,-lstdc++,-Bdynamic -lm' --with-pkgversion='Arch Repository' --with-bugurl=https://bugs.archlinux.org/ --with-multilib-list=rmprofile Thread model: single Supported LTO compression algorithms: zlib zstd gcc version 12.2.0 (Arch Repository) ---- arm-none-eabi-g++ -v Using built-in specs. COLLECT_GCC=/home/mauro/compilers/gcc-arm-none-eabi-8-2018-q4-major/bin/arm-none-eabi-g++ COLLECT_LTO_WRAPPER=/home/mauro/compilers/gcc-arm-none-eabi-8-2018-q4-major/bin/../lib/gcc/arm-none-eabi/8.2.1/lto-wrapper Target: arm-none-eabi Configured with: /tmp/jenkins/jenkins-GCC-8-build_toolchain_docker-519_20181216_1544945247/src/gcc/configure --target=arm-none-eabi --prefix=/tmp/jenkins/jenkins-GCC-8-build_toolchain_docker-519_20181216_1544945247/install-native --libexecdir=/tmp/jenkins/jenkins-GCC-8-build_toolchain_docker-519_20181216_1544945247/install-native/lib --infodir=/tmp/jenkins/jenkins-GCC-8-build_toolchain_docker-519_20181216_1544945247/install-native/share/doc/gcc-arm-none-eabi/info --mandir=/tmp/jenkins/jenkins-GCC-8-build_toolchain_docker-519_20181216_1544945247/install-native/share/doc/gcc-arm-none-eabi/man --htmldir=/tmp/jenkins/jenkins-GCC-8-build_toolchain_docker-519_20181216_1544945247/install-native/share/doc/gcc-arm-none-eabi/html --pdfdir=/tmp/jenkins/jenkins-GCC-8-build_toolchain_docker-519_20181216_1544945247/install-native/share/doc/gcc-arm-none-eabi/pdf --enable-languages=c,c++ --enable-plugins --disable-decimal-float --disable-libffi --disable-libgomp --disable-libmudflap --disable-libquadmath --disable-libssp --disable-libstdcxx-pch --disable-nls --disable-shared --disable-threads --disable-tls --with-gnu-as --with-gnu-ld --with-newlib --with-headers=yes --with-python-dir=share/gcc-arm-none-eabi --with-sysroot=/tmp/jenkins/jenkins-GCC-8-build_toolchain_docker-519_20181216_1544945247/install-native/arm-none-eabi --build=x86_64-linux-gnu --host=x86_64-linux-gnu --with-gmp=/tmp/jenkins/jenkins-GCC-8-build_toolchain_docker-519_20181216_1544945247/build-native/host-libs/usr --with-mpfr=/tmp/jenkins/jenkins-GCC-8-build_toolchain_docker-519_20181216_1544945247/build-native/host-libs/usr --with-mpc=/tmp/jenkins/jenkins-GCC-8-build_toolchain_docker-519_20181216_1544945247/build-native/host-libs/usr --with-isl=/tmp/jenkins/jenkins-GCC-8-build_toolchain_docker-519_20181216_1544945247/build-native/host-libs/usr --with-libelf=/tmp/jenkins/jenkins-GCC-8-build_toolchain_docker-519_20181216_1544945247/build-native/host-libs/usr --with-host-libstdcxx='-static-libgcc -Wl,-Bstatic,-lstdc++,-Bdynamic -lm' --with-pkgversion='GNU Tools for Arm Embedded Processors 8-2018-q4-major' --with-multilib-list=rmprofile Thread model: single gcc version 8.2.1 20181213 (release) [gcc-8-branch revision 267074] (GNU Tools for Arm Embedded Processors 8-2018-q4-major)
