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7 years ago.
mbed_blinky fails to build on gcc -- undefined references to __wrap__*
I want to compile an mbed program using gcc. I tried the following steps and it did not work
1) In the on line compiler, I import "mbed_blinky", it works fine in that environment and I can make a LED blink.
2) I do "export program" and for good measure check the box to export all the files
3) On my Unbuntu 16 system, I see the compressed tar file. I unpack it and find there is a file called "Makefile"
4) I type "make". It compiles fine but does not link because of about a dozen undefined references to things called wrap* that appear to be wrappers around the normal malloc family of functions.
5) I check to see what version of arm gcc I have and get that it is current (see below)
chris@VM:mbed_blinky$ arm-none-eabi-gcc --version arm-none-eabi-gcc (15:4.9.3+svn231177-1) 4.9.3 20150529 (prerelease) Copyright (C) 2014 Free Software Foundation, Inc.
6) Of course I try to "Google" this and I get MANY hits with others asking this question but no solutions. SURELY there must be a way to compile the "Hello World" program on a on current issue Ubuntu system.
7) BTW. I first tried this on my Apple Mac. Got the EXACT same errors. But I figured few others use Macs. So I fired up Ubuntu, did the apt-get upgrade and got the same result. So I doubt the problem is my development environment
Here is the copy/paste from the terminal
chris@VM:mbed_blinky$ make Compile: main.cpp link: mbed_blinky.elf /usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/lib/armv7e-m/softfp/libc.a(lib_a-fflush.o): In function `__sflush_r': /build/newlib-5zwpxE/newlib-2.2.0+git20150830.5a3d536/build/arm-none-eabi/armv7e-m/softfp/newlib/libc/stdio/../../../../../../../newlib/libc/stdio/fflush.c:198: undefined reference to `__wrap__free_r' /usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/lib/armv7e-m/softfp/libc.a(lib_a-fclose.o): In function `_fclose_r': /build/newlib-5zwpxE/newlib-2.2.0+git20150830.5a3d536/build/arm-none-eabi/armv7e-m/softfp/newlib/libc/stdio/../../../../../../../newlib/libc/stdio/fclose.c:109: undefined reference to `__wrap__free_r' /build/newlib-5zwpxE/newlib-2.2.0+git20150830.5a3d536/build/arm-none-eabi/armv7e-m/softfp/newlib/libc/stdio/../../../../../../../newlib/libc/stdio/fclose.c:111: undefined reference to `__wrap__free_r' /build/newlib-5zwpxE/newlib-2.2.0+git20150830.5a3d536/build/arm-none-eabi/armv7e-m/softfp/newlib/libc/stdio/../../../../../../../newlib/libc/stdio/fclose.c:107: undefined reference to `__wrap__free_r' /usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/lib/armv7e-m/softfp/libc.a(lib_a-svfprintf.o): In function `_svfprintf_r': /build/newlib-5zwpxE/newlib-2.2.0+git20150830.5a3d536/build/arm-none-eabi/armv7e-m/softfp/newlib/libc/stdio/../../../../../../../newlib/libc/stdio/vfprintf.c:882: undefined reference to `__wrap__malloc_r' /usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/lib/armv7e-m/softfp/libc.a(lib_a-mprec.o): In function `_Balloc': /build/newlib-5zwpxE/newlib-2.2.0+git20150830.5a3d536/build/arm-none-eabi/armv7e-m/softfp/newlib/libc/stdlib/../../../../../../../newlib/libc/stdlib/mprec.c:106: undefined reference to `__wrap__calloc_r' /build/newlib-5zwpxE/newlib-2.2.0+git20150830.5a3d536/build/arm-none-eabi/armv7e-m/softfp/newlib/libc/stdlib/../../../../../../../newlib/libc/stdlib/mprec.c:123: undefined reference to `__wrap__calloc_r' /usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/lib/armv7e-m/softfp/libc.a(lib_a-svfiprintf.o): In function `__ssprint_r': /build/newlib-5zwpxE/newlib-2.2.0+git20150830.5a3d536/build/arm-none-eabi/armv7e-m/softfp/newlib/libc/stdio/../../../../../../../newlib/libc/stdio/vfprintf.c:312: undefined reference to `__wrap__malloc_r' /build/newlib-5zwpxE/newlib-2.2.0+git20150830.5a3d536/build/arm-none-eabi/armv7e-m/softfp/newlib/libc/stdio/../../../../../../../newlib/libc/stdio/vfprintf.c:323: undefined reference to `__wrap__realloc_r' /build/newlib-5zwpxE/newlib-2.2.0+git20150830.5a3d536/build/arm-none-eabi/armv7e-m/softfp/newlib/libc/stdio/../../../../../../../newlib/libc/stdio/vfprintf.c:327: undefined reference to `__wrap__free_r' collect2: error: ld returned 1 exit status /home/chris/Downloads/mbed_blinky/Makefile:331: recipe for target 'mbed_blinky.elf' failed make[1]: *** [mbed_blinky.elf] Error 1 Makefile:25: recipe for target 'all' failed make: *** [all] Error 2 chris@VM:mbed_blinky$ arm-none-eabi-gcc --version arm-none-eabi-gcc (15:4.9.3+svn231177-1) 4.9.3 20150529 (prerelease) Copyright (C) 2014 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Thanks for reading this far
Chris
2 Answers
7 years ago.
Hi Chris,
This is a "workflow bug" in our online tooling. It can take some time to convince the tools online that they should export very recent versions of mbed as mbed and not mbed-os. This generally only affects the most recent versions of mbed. As a workaround, you are free to remove the
-Wl,--wrap,_free_r
and similar from both the LD and LD_FLAGS variables.
We are working on an automatic mechanism to update the online tools knowledge of mbed releases when they happen.
Sorry for the inconvenience, -Jimmy
7 years ago.
Hi. Have you seen these ?
http://www.josho.org/blog/blog/2014/11/30/nucleo-gcc/
https://embeddist.wordpress.com/2015/05/21/how-to-build-arm-mbed-projects-on-gnu-tools-offline/
https://developer.mbed.org/handbook/Exporting-to-GCC-ARM-Embedded
and the last post here:
https://developer.mbed.org/forum/bugs-suggestions/topic/4228/
Thanks. I had only seen the links on the mbed site. The article at josho.org described the problem: The exporter creates broken Makefiles that need to be hand edited. His specific fixes did not work for me but now I know I need to look for some library that has wrap* in it and add it the LD_PATH.
posted by 04 May 2017