Matteo Concas created an issue:
https://gitlab.rtems.org/rtems/tools/rtems_waf/-/issues/7
## Summary
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This is on GCC 16.1.0:
```bash
$ sparc-rtems7-gcc --version
sparc-rtems7-gcc (GCC) 16.1.0 20260430 (RTEMS 7, RSB
b03c726e60e703b4a3d4e265cb8e9badc5235f0a, Newlib a0ccec7e)
Copyright (C) 2026 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.
```
A valid RTEMS SMP BSP will return "The configuration failed" even though
nothing is wrong with the BSP itself.
## Steps to reproduce
Pick your favorite BSP in SMP configuration and run the Waf configure step:
```bash
$ ./waf -p configure --prefix=/opt/rtems/7 --rtems-bsps=sparc/gr740_smp
Setting top to : /home/matteo/dev/rtems/rtems-libbsd
Setting out to :
/home/matteo/dev/rtems/rtems-libbsd/build
RTEMS Version : 7
Architectures : riscv-rtems7, sparc-rtems7
Board Support Package (BSP) : sparc-rtems7-gr740_smp
Show commands : no
Long commands : no
Checking for program 'sparc-rtems7-gcc' : /opt/rtems/7/bin/sparc-rtems7-gcc
Checking for program 'sparc-rtems7-g++' : /opt/rtems/7/bin/sparc-rtems7-g++
Checking for program 'sparc-rtems7-gcc' : /opt/rtems/7/bin/sparc-rtems7-gcc
Checking for program 'sparc-rtems7-ld' : /opt/rtems/7/bin/sparc-rtems7-ld
Checking for program 'sparc-rtems7-ar' : /opt/rtems/7/bin/sparc-rtems7-ar
Checking for program 'sparc-rtems7-nm' : /opt/rtems/7/bin/sparc-rtems7-nm
Checking for program 'sparc-rtems7-objdump' :
/opt/rtems/7/bin/sparc-rtems7-objdump
Checking for program 'sparc-rtems7-objcopy' :
/opt/rtems/7/bin/sparc-rtems7-objcopy
Checking for program 'sparc-rtems7-readelf' :
/opt/rtems/7/bin/sparc-rtems7-readelf
Checking for program 'sparc-rtems7-strip' :
/opt/rtems/7/bin/sparc-rtems7-strip
Checking for program 'sparc-rtems7-ranlib' :
/opt/rtems/7/bin/sparc-rtems7-ranlib
Checking for program 'rtems-ld' : /opt/rtems/7/bin/rtems-ld
Checking for program 'rtems-tld' : /opt/rtems/7/bin/rtems-tld
Checking for program 'rtems-syms' : /opt/rtems/7/bin/rtems-syms
Checking for program 'rtems-bin2c' : /opt/rtems/7/bin/rtems-bin2c
Checking for program 'tar' : /usr/bin/tar
Checking for program 'gcc, cc' : /opt/rtems/7/bin/sparc-rtems7-gcc
Checking for program 'ar' : /opt/rtems/7/bin/sparc-rtems7-ar
Checking for program 'g++, c++' : /opt/rtems/7/bin/sparc-rtems7-g++
Checking for program 'ar' : /opt/rtems/7/bin/sparc-rtems7-ar
Checking for program 'gas, gcc' : /opt/rtems/7/bin/sparc-rtems7-gcc
Checking for program 'ar' : /opt/rtems/7/bin/sparc-rtems7-ar
Checking for c flags '-MMD' : yes
Checking for cxx flags '-MMD' : yes
Compiler version (sparc-rtems7-gcc) : 16.1.0 20260430 (RTEMS 7, RSB
b03c726e60e703b4a3d4e265cb8e9badc5235f0a, Newlib a0ccec7e)
Checking for a valid RTEMS BSP installation : no
The configuration failed
(complete log in /home/matteo/dev/rtems/rtems-libbsd/build/config.log)
```
The checks fail when we try to compile and link a minimal RTEMS application:
```log
-------------------------------------------
Checking for a valid RTEMS BSP installation
==>
#include <rtems.h>
void Init(rtems_task_argument arg) { (void)arg; }
#define CONFIGURE_APPLICATION_DOES_NOT_NEED_CLOCK_DRIVER
#define CONFIGURE_MAXIMUM_TASKS 1
#define CONFIGURE_RTEMS_INIT_TASKS_TABLE
#define CONFIGURE_INIT
#include <rtems/confdefs.h>
<==
[1/2] Compiling build/.conf_check_f1288dec71125f8a90f82dc0a53c5163/test.c
['/opt/rtems/7/bin/sparc-rtems7-gcc', '-mcpu=leon3',
'-isystem/opt/rtems/7/sparc-rtems7/gr740_smp/lib/include', '-MMD', '../test.c',
'-c',
'-o/home/matteo/dev/rtems/rtems-libbsd/build/.conf_check_f1288dec71125f8a90f82dc0a53c5163/testbuild/test.c.1.o']
[2/2] Linking
build/.conf_check_f1288dec71125f8a90f82dc0a53c5163/testbuild/testprog
['/opt/rtems/7/bin/sparc-rtems7-gcc', '-mcpu=leon3',
'-isystem/opt/rtems/7/sparc-rtems7/gr740_smp/lib/include', '-MMD',
'-mcpu=leon3', '-B/opt/rtems/7/sparc-rtems7/gr740_smp/lib', '-qrtems',
'-Wl,--gc-sections', 'test.c.1.o',
'-o/home/matteo/dev/rtems/rtems-libbsd/build/.conf_check_f1288dec71125f8a90f82dc0a53c5163/testbuild/testprog',
'-Wl,-Bstatic', '-Wl,-Bdynamic']
err:
/opt/rtems/7/bin/../lib/gcc/sparc-rtems7/16.1.0/../../../../sparc-rtems7/bin/ld:
/opt/rtems/7/sparc-rtems7/gr740_smp/lib/start.o: in function `hard_reset':
....
```
I won't put the full error trace as I don't think it's very relevant.
Now if I try to run the exact same commands from the terminal I will run into
the same errors which is expected.
To actually get the application to link I need to supply
`-B/opt/rtems/7/sparc-rtems7/gr740_smp/lib` in the compile step and then
everything is fine.
The "dirty" fix for this is to have:
```diff
diff --git a/rtems.py b/rtems.py
index c35b7d0..981a48b 100644
--- a/rtems.py
+++ b/rtems.py
@@ -268,7 +268,7 @@ def configure(conf, bsp_configure=None):
cflags['cxxflags'] = copy.copy(cflags['cflags'])
cflags['asflags'] = copy.copy(cflags['cflags'])
- conf.env.CFLAGS = cflags['cflags']
+ conf.env.CFLAGS = cflags['cflags'] + ldflags['specs']
conf.env.CXXFLAGS = cflags['cxxflags']
conf.env.ASFLAGS = cflags['asflags']
conf.env.WFLAGS = cflags['warnings']
```
I have only run into this trying to configure rtems-libbsd. I'm quite surprised
I haven't seen this earlier.
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View it on GitLab: https://gitlab.rtems.org/rtems/tools/rtems_waf/-/issues/7
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