Brijesh-Thakkar commented on issue #18393:
URL: https://github.com/apache/nuttx/issues/18393#issuecomment-6241411494
correction to my previous comment, i dug further and the libgcc-10-dev
theory was wrong.
i reproduced the exact error (both "cannot find -lgcc_s" lines,
Makefile:460, Unix.mk:552) in a clean ubuntu:20.04 container with gcc 10.5.0,
using the tree from the issue date (nuttx 37226646fc). the toolchain was
healthy, libgcc-10-dev was installed.
root cause: arch/sim's Make.defs linked with `-Wl,-no-pie`. that flag only
reaches ld, so the gcc driver still sets up a PIE link (Scrt1.o, crtbeginS.o),
and ld ends up searching for libgcc_s.a, which ubuntu doesn't ship. `gcc
-Wl,-no-pie hello.c` fails the same way, while `gcc -no-pie hello.c` works.
the make build was already fixed on master by fd907e6ef4 ("sim: pass no-pie
through gcc driver"). current master builds fine in the same container.
@PlutusCN @wangtao13 could you pull latest master and confirm?
the cmake build (arch/sim/src/cmake/Toolchain.cmake) still uses
`-Wl,-no-pie`, so i'm checking whether it hits the same error and will send a
fix if it does.
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