Comments (12)
Chandler-Kluser
commented on May 22, 2024
1
Install riscv64-elf-newlib:
# I use arch, btw
sudo pacman -S riscv64-elf-newlib
and add this include path parameter to Makefile:
-I/usr/riscv64-elf/include
It worked for me this way
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Chandler-Kluser
commented on May 22, 2024
1
Another solution is to import this library, it works too!!
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karstengit
commented on May 22, 2024
Alternative I tried to use sprintf to format an value into a string now.
But only printf is available, sprintf cannot be found!
It is the same with other functions in <string.h> like strcat.
$ make
riscv64-unknown-elf-gcc -o spi_lcd.elf ../../ch32v003fun/ch32v003fun.c spi_lcd.c -g -Os -flto -ffunction-sections -static-libgcc -march=rv32ec -mabi=ilp32e -I/usr/include/newlib -I../../ch32v003fun/../extralibs -I../../ch32v003fun -nostdlib -I. -Wall -T ../../ch32v003fun/ch32v003fun.ld -Wl,--gc-sections -L../../ch32v003fun/../misc -lgcc
/usr/lib/riscv64-unknown-elf/bin/ld: /tmp/cccOzuwj.ltrans0.ltrans.o: in function `.L0 ':
/win/WCH/K/examples/spi_lcd/lcd.c:110: undefined reference to `sprintf'
/usr/lib/riscv64-unknown-elf/bin/ld: /win/WCH/K/examples/spi_lcd/lcd.c:167: undefined reference to `sprintf'
collect2: error: ld returned 1 exit status
make: *** [../../ch32v003fun/ch32v003fun.mk:24: spi_lcd.elf] Fehler 1
undefined reference to `sprintf'
Every conversion of a number into a string is not allowed? ;-)
Only printf to an UART?
Every string operation is a problem.
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karstengit
commented on May 22, 2024
If someone else has the same problem and this bug will not be solved, you can copy as workaround the needed functions into your code. That is working.
https://github.com/vancegroup-mirrors/avr-libc/tree/master/avr-libc/tests/simulate/stdlib
For example:
static char *ultoa_recursive (unsigned long val, char *s, unsigned radix)
{
int c;
if (val >= radix)
s = ultoa_recursive (val / radix, s, radix);
c = val % radix;
c += (c < 10 ? '0' : 'a' - 10);
*s++ = c;
return s;
}
static char *ultoa (unsigned long val, char *s, int radix)
{
if (radix < 2 || radix > 36)
s[0] = 0;
else
*ultoa_recursive (val, s, radix) = 0;
return s;
}
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cnlohr
commented on May 22, 2024
Normally that comes with libgcc, but, I appreciate the answer - do you mind if we close the issue?
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karstengit
commented on May 22, 2024
Addtionally installed package libgcc-10-dev-riscv64-cross and dependent packages with many MB data.
Install: gcc-10-cross-base-ports:amd64 (10.2.1-6cross1, automatic), libgcc-10-dev-riscv64-cross:amd64 (10.2.1-6cross1), libatomic1-riscv64-cross:amd64 (10.2.1-6cross1, automatic), libc6-dev-riscv64-cross:amd64 (2.31-9cross4, automatic), linux-libc-dev-riscv64-cross:amd64 (5.10.13-1cross4, automatic), libgomp1-riscv64-cross:amd64 (10.2.1-6cross1, automatic), libc6-riscv64-cross:amd64 (2.31-9cross4, automatic), libgcc-s1-riscv64-cross:amd64 (10.2.1-6cross1, automatic)
No change - it still does not find an ultoa or sprintf.
I have no idea where to search?
Maybe a newer version of gcc-riscv64-unknown-elf will help, but it is not easy to get it into the stable system.
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maxgerhardt
commented on May 22, 2024
The Makefile explicitly builds with -nostdlib, maybe that's the problem?
In the MounRiver toolchain I can build with stdlib functions perfectly fine, but I also add --specs=nano.specs --specs=nosys.specs, which doesn't work with the standard GCC because they don't seem to have those libs precompiled for rv32ec
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mengstr
commented on May 22, 2024
A version of sprint() is included in the fun-library, but it's not in the .h file so you need to declare it yourself to avoid warnings.
int mini_snprintf(char* buffer, unsigned int buffer_len, const char *fmt, ...);
int main() {
char buf[20];
mini_snprintf(buf, sizeof(buf), "%s %x", "Hello", 10);
}
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karstengit
commented on May 22, 2024
The Makefile explicitly builds with
-nostdlib, maybe that's the problem?
Yes - I already did see this too and tried to compile without this option, but there where other problems I cannot remember.
In the MounRiver toolchain I can build with stdlib functions perfectly fine, but I also add
--specs=nano.specs --specs=nosys.specs, which doesn't work with the standard GCC because they don't seem to have those libs precompiled for rv32ec
O.K. Thanks. The meaning for the gcc-riscv64-unknown-elf is not clear to me at this time, but it is a good hint.
I will try to setup a small Debian testing (trixie) with a newer gcc-riscv64-unknown-elf 12.2.0-14 first and see how the behaviour will be there. https://packages.debian.org/sid/gcc-riscv64-unknown-elf
I did not notice that there is a new Debian stable (bookworm) since June 10th, 2023. Hmmm - it has the newer compiler too - more work for an upgrade instead of an separate install of testing.
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karstengit
commented on May 22, 2024
System upgrade to Debian 12 (bookworm) done. The positive message is that this part works without problems.
The negative message is that the upgrade does not effect the described problem with the missing library functions.
$ make
riscv64-unknown-elf-gcc -o spi_lcd.elf ../../ch32v003fun/ch32v003fun.c spi_lcd.c -g -Os -flto -ffunction-sections -static-libgcc -march=rv32ec -mabi=ilp32e -I/usr/include/newlib -I../../ch32v003fun/../extralibs -I../../ch32v003fun -nostdlib -I. -Wall -T ../../ch32v003fun/ch32v003fun.ld -Wl,--gc-sections -L../../ch32v003fun/../misc -lgcc
spi_lcd.c: In function 'main':
spi_lcd.c:93:9: warning: implicit declaration of function 'ultoa'; did you mean 'utoa'? [-Wimplicit-function-declaration]
93 | ultoa(SYSTEM_CORE_CLOCK / 1000000, lpuffer, 10);
| ^~~~~
| utoa
/usr/lib/gcc/riscv64-unknown-elf/12.2.0/../../../riscv64-unknown-elf/bin/ld: /tmp/ccPVLYzm.ltrans0.ltrans.o: in function `.L0 ':
/win/WCH/K/examples/spi_lcd/lcd.c:110: undefined reference to `ultoa'
/usr/lib/gcc/riscv64-unknown-elf/12.2.0/../../../riscv64-unknown-elf/bin/ld: /win/WCH/K/examples/spi_lcd/lcd.c:167: undefined reference to `ultoa'
collect2: error: ld returned 1 exit status
make: *** [../../ch32v003fun/ch32v003fun.mk:27: spi_lcd.elf] Fehler 1
undefined reference to `ultoa'
$ make
riscv64-unknown-elf-gcc -o spi_lcd.elf ../../ch32v003fun/ch32v003fun.c spi_lcd.c -g -Os -flto -ffunction-sections -static-libgcc -march=rv32ec -mabi=ilp32e -I/usr/include/newlib -I../../ch32v003fun/../extralibs -I../../ch32v003fun -nostdlib -I. -Wall -T ../../ch32v003fun/ch32v003fun.ld -Wl,--gc-sections -L../../ch32v003fun/../misc -lgcc
/usr/lib/gcc/riscv64-unknown-elf/12.2.0/../../../riscv64-unknown-elf/bin/ld: /tmp/cc98ACmE.ltrans0.ltrans.o: in function `.L0 ':
/win/WCH/K/examples/spi_lcd/lcd.c:116: undefined reference to `sprintf'
/usr/lib/gcc/riscv64-unknown-elf/12.2.0/../../../riscv64-unknown-elf/bin/ld: /win/WCH/K/examples/spi_lcd/lcd.c:166: undefined reference to `sprintf'
collect2: error: ld returned 1 exit status
make: *** [../../ch32v003fun/ch32v003fun.mk:27: spi_lcd.elf] Fehler 1
kars
undefined reference to `sprintf'
$ riscv64-unknown-elf-gcc -v
Using built-in specs.
COLLECT_GCC=riscv64-unknown-elf-gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/riscv64-unknown-elf/12.2.0/lto-wrapper
Target: riscv64-unknown-elf
Configured with: ../gcc-12.2.0/configure --build=x86_64-linux-gnu --prefix=/usr --includedir='/usr/lib/include' --mandir='/usr/lib/share/man' --infodir='/usr/lib/share/info' --sysconfdir=/etc --localstatedir=/var --disable-option-checking --disable-silent-rules --libdir='/usr/lib/lib/x86_64-linux-gnu' --libexecdir='/usr/lib/lib/x86_64-linux-gnu' --disable-maintainer-mode --disable-dependency-tracking --enable-languages=c,c++ --prefix=/usr/lib --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-system-zlib --enable-multilib --disable-decimal-float --disable-libffi --disable-libgomp --disable-libmudflap --disable-libquadmath --disable-libssp --disable-libstdcxx-pch --disable-libstdc++-v3 --disable-nls --disable-shared --disable-threads --with-arch=rv64imafdc --enable-tls --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=riscv64-unknown-elf --with-gnu-as --with-gnu-ld --with-headers=no --without-newlib --with-pkgversion=12.2.0-14+11+b1 --without-included-gettext SED=/bin/sed SHELL=/bin/sh BASH=/bin/bash CONFIG_SHELL=/bin/bash AR_FOR_TARGET=riscv64-unknown-elf-ar AS_FOR_TARGET=riscv64-unknown-elf-as LD_FOR_TARGET=riscv64-unknown-elf-ld NM_FOR_TARGET=riscv64-unknown-elf-nm OBJDUMP_FOR_TARGET=riscv64-unknown-elf-objdump RANLIB_FOR_TARGET=riscv64-unknown-elf-ranlib READELF_FOR_TARGET=riscv64-unknown-elf-readelf STRIP_FOR_TARGET=riscv64-unknown-elf-strip ASFLAGS= CFLAGS='-g -O2 -ffile-prefix-map=/build/gcc-riscv64-unknown-elf-jdqiw5/gcc-riscv64-unknown-elf-11+b1=. -fstack-protector-strong' CPPFLAGS='-Wdate-time -D_FORTIFY_SOURCE=2' CXXFLAGS='-g -O2 -ffile-prefix-map=/build/gcc-riscv64-unknown-elf-jdqiw5/gcc-riscv64-unknown-elf-11+b1=. -fstack-protector-strong' DFLAGS=-frelease FCFLAGS='-g -O2 -ffile-prefix-map=/build/gcc-riscv64-unknown-elf-jdqiw5/gcc-riscv64-unknown-elf-11+b1=. -fstack-protector-strong' FFLAGS='-g -O2 -ffile-prefix-map=/build/gcc-riscv64-unknown-elf-jdqiw5/gcc-riscv64-unknown-elf-11+b1=. -fstack-protector-strong' GCJFLAGS='-g -O2 -ffile-prefix-map=/build/gcc-riscv64-unknown-elf-jdqiw5/gcc-riscv64-unknown-elf-11+b1=. -fstack-protector-strong' LDFLAGS='-Wl,-z,relro -Wl,-z,now' OBJCFLAGS='-g -O2 -ffile-prefix-map=/build/gcc-riscv64-unknown-elf-jdqiw5/gcc-riscv64-unknown-elf-11+b1=. -fstack-protector-strong' OBJCXXFLAGS='-g -O2 -ffile-prefix-map=/build/gcc-riscv64-unknown-elf-jdqiw5/gcc-riscv64-unknown-elf-11+b1=. -fstack-protector-strong' INHIBIT_LIBC_CFLAGS=-DUSE_TM_CLONE_REGISTRY=0 'CFLAGS_FOR_TARGET=-Os -mcmodel=medany' 'CXXFLAGS_FOR_TARGET=-Os -mcmodel=medany'
Thread model: single
Supported LTO compression algorithms: zlib
gcc version 12.2.0 (12.2.0-14+11+b1)
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cnlohr
commented on May 22, 2024
I'm going to mark this as complete now.
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TommyMurphyTM1234
commented on May 22, 2024
In the MounRiver toolchain I can build with stdlib functions perfectly fine, but I also add
--specs=nano.specs --specs=nosys.specs, which doesn't work with the standard GCC because they don't seem to have those libs precompiled for rv32ec
Poking an old (closed) issue but, in case it helps anyone, the xPack GNU RISC-V Embedded GCC toolchain bundles Newlib nano support for rv32ec/ilp32:
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