yf13 opened a new issue, #11341:
URL: https://github.com/apache/nuttx/issues/11341
When buildling `rv-virt:nsh64` with the stock toolchain installed via `sudo
apt install gcc-riscv64-unknown-elf` on Ubuntu 22.04, I got the following error:
```
$ make
./stdlib/lib_strtold.c:44:10: fatal error: math.h: No such file or directory
44 | #include <math.h>
| ^~~~~~~~
compilation terminated.
ERROR: riscv64-unknown-elf-gcc failed: 1
command: riscv64-unknown-elf-gcc -MT bin/lib_strtold.o -M
'-fno-common' '-Wall' '-Wstrict-prototypes' '-Wshadow' '-Wundef'
'-Wno-attributes' '-Wno-unknown-pragmas' '-Wno-psabi' '-Os'
'-fno-strict-aliasing' '-fomit-frame-pointer' '-ffunction-sections'
'-fdata-sections' '-g' '-mcmodel=medany' '-march=rv64imafdc' '-mabi=lp64d'
'-isystem' '/home/yf/Projects/Nuttx/nuttx/include' '-D__NuttX__' '-pipe' '-I'
'/home/yf/Projects/Nuttx/nuttx/libs/libc' ./stdlib/lib_strtold.c
make[2]: *** [/home/yf/Projects/Nuttx/nuttx/tools/Config.mk:228:
lib_strtold.ddc] Error 1
make[1]: *** [Makefile:189: .depend] Error 2
make: *** [tools/Unix.mk:606: pass1dep] Error 2
```
The toolchain has the following version info:
```
$ riscv64-unknown-elf-gcc -v
Using built-in specs.
COLLECT_GCC=riscv64-unknown-elf-gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/riscv64-unknown-elf/10.2.0/lto-wrapper
Target: riscv64-unknown-elf
Configured with: ../configure --build=x86_64-linux-gnu --prefix=/usr
--includedir='/usr/include' --mandir='/usr/share/man'
--infodir='/usr/share/info' --sysconfdir=/etc --localstatedir=/var
--disable-option-checking --disable-silent-rules
--libdir='/usr/lib/x86_64-linux-gnu' --libexecdir='/usr/lib/x86_64-linux-gnu'
--disable-maintainer-mode --disable-dependency-tracking
--target=riscv64-unknown-elf --prefix=/usr
--infodir=/usr/share/doc/gcc-riscv64-unknown-elf/info --mandir=/usr/share/man
--htmldir=/usr/share/doc/gcc-riscv64-unknown-elf/html
--pdfdir=/usr/share/doc/gcc-riscv64-unknown-elf/pdf --bindir=/usr/bin
--libexecdir=/usr/lib --libdir=/usr/lib --with-pkgversion= --disable-shared
--disable-threads --enable-languages=c,c++ --enable-tls --with-newlib
--with-native-system-header-dir=/include --disable-libmudflap --disable-libssp
--disable-libquadmath --disable-libgomp --disable-nls --with-system-zlib
--enable-checking=yes --enable-multilib --with-abi=lp64d --disable-libstdcxx-pc
h --disable-libstdcxx --disable-fixinc --with-arch=rv64imafdc --with-gnu-as
--with-gnu-ld --with-as=/usr/lib/riscv64-unknown-elf/bin/as
--with-ld=/usr/lib/riscv64-unknown-elf/bin/ld
AR_FOR_TARGET=/usr/lib/riscv64-unknown-elf/bin/ar
AS_FOR_TARGET=/usr/lib/riscv64-unknown-elf/bin/as
NM_FOR_TARGET=/usr/lib/riscv64-unknown-elf/bin/nm
LD_FOR_TARGET=/usr/lib/riscv64-unknown-elf/bin/ld
OBJDUMP_FOR_TARGET=/usr/lib/riscv64-unknown-elf/bin/objdump
RANLIB_FOR_TARGET=/usr/lib/riscv64-unknown-elf/bin/ranlib
READELF_FOR_TARGET=/usr/lib/riscv64-unknown-elf/bin/readelf
STRIP_FOR_TARGET=/usr/lib/riscv64-unknown-elf/bin/strip CFLAGS='-g -O2
-fdebug-prefix-map=/build/gcc-riscv64-unknown-elf-LkcieF/gcc-riscv64-unknown-elf-10.2.0=.
-fstack-protector-strong' CPPFLAGS='-Wdate-time -D_FORTIFY_SOURCE=2'
CXXFLAGS='-g -O2
-fdebug-prefix-map=/build/gcc-riscv64-unknown-elf-LkcieF/gcc-riscv64-unknown-elf-10.2.0=.
-fstack-protector-strong' FCFLAGS='-g -O2
-fdebug-prefix-map=/build/gcc-riscv64-unknown-elf-LkcieF/g
cc-riscv64-unknown-elf-10.2.0=. -fstack-protector-strong' FFLAGS='-g -O2
-fdebug-prefix-map=/build/gcc-riscv64-unknown-elf-LkcieF/gcc-riscv64-unknown-elf-10.2.0=.
-fstack-protector-strong' GCJFLAGS='-g -O2
-fdebug-prefix-map=/build/gcc-riscv64-unknown-elf-LkcieF/gcc-riscv64-unknown-elf-10.2.0=.
-fstack-protector-strong' LDFLAGS='-Wl,-Bsymbolic-functions -Wl,-z,relro
-Wl,-z,now' OBJCFLAGS='-g -O2
-fdebug-prefix-map=/build/gcc-riscv64-unknown-elf-LkcieF/gcc-riscv64-unknown-elf-10.2.0=.
-fstack-protector-strong' OBJCXXFLAGS='-g -O2
-fdebug-prefix-map=/build/gcc-riscv64-unknown-elf-LkcieF/gcc-riscv64-unknown-elf-10.2.0=.
-fstack-protector-strong' 'CFLAGS_FOR_TARGET=-Os -mcmodel=medany'
'CXXFLAGS_FOR_TARGET=-Os -mcmodel=medany'
Thread model: single
Supported LTO compression algorithms: zlib
gcc version 10.2.0 ()
```
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