Re: error: undefined symbol: main in poudriere jail

On 24 Sep, blubee blubeeme wrote:
> This issue seemed to have come up in the past:
> https://lists.freebsd.org/pipermail/freebsd-current/2018-March/068870.html
> 
> 
> Jail name:         amd64_cur
> Jail version:      12.0-ALPHA7 1200084
> Jail vcs version:  r338898
> Jail arch:         amd64
> Jail method:       svn
> Jail mount:        /usr/local/poudriere/jails/amd64_cur
> Jail fs:           zroot/poudriere/jails/amd64_cur
> Jail updated:      2018-09-24 03:39:31
> Tree name:         default
> Tree method:       portsnap
> Status:
> 
> error
> /usr/bin/cc -pipe -fno-strict-aliasing -fno-common -fexceptions -std=gnu99
> -m64 -Qunused-arguments -O3 -march=native -finline-functions -flto
> -fomit-frame-pointer -pedantic -pedantic-errors -Wall -Wextra -Wundef
> -Wfloat-equal -Wshadow -Wbad-function-cast -Wdeclaration-after-statement
> -Wc++-compat -Winline -Wno-long-long -Wno-variadic-macros -Wdocumentation
> -m64 src/rttherm/CMakeFiles/rttherm.dir/spectrum.c.o
> src/rttherm/CMakeFiles/rttherm.dir/viewtherm.c.o  -o bin/rttherm
> -Wl,-rpath,/wrkdirs/usr/ports/cad/brlcad/work/.build/lib:/usr/local/lib:
> lib/libged.so.20.0.1 lib/librtuif_multispectral.a
> lib/libmultispectral.so.20.0.1 lib/libfb.so.20.0.1 lib/libpkg.so.20.0.1
> /usr/local/lib/libSM.so /usr/local/lib/libICE.so /usr/local/lib/libGLU.so
> /usr/local/lib/libGL.so /usr/local/lib/libSM.so /usr/local/lib/libICE.so
> /usr/local/lib/libGLU.so /usr/local/lib/libGL.so lib/libtk.so.8.5
> /usr/local/lib/libX11.so /usr/local/lib/libXext.so lib/libtkstub.a
> lib/libtclstub.a /usr/local/lib/libXrender.so lib/libwdb.so.20.0.1
> lib/libicv.so.20.0.1 lib/libpng16.so.16.29.0 lib/libnetpbm.so
> lib/libanalyze.so.20.0.1 lib/libtcl.so.8.5.19 lib/libclipper.so.4.6.0
> lib/librt.so.20.0.1 lib/libnmg.so lib/libgdiam.so lib/libvds.so.1.0.1
> lib/libbrep.so.20.0.1 lib/libbg.so.20.0.1 lib/libopenNURBS.so.2012.10.245
> lib/libp2t.so.1.0.1 lib/libz.so.1.2.11 lib/libtinycthread.so lib/liblz4.so
> lib/libbn.so.20.0.1 lib/libbu.so.20.0.1 lib/libregex.so.1.0.4 -lm -pthread
> -ldl && :
> FAILED: bin/rttherm
> : && /usr/bin/cc -pipe -fno-strict-aliasing -fno-common -fexceptions
> -std=gnu99 -m64 -Qunused-arguments -O3 -march=native -finline-functions
> -flto -fomit-frame-pointer -pedantic -pedantic-errors -Wall -Wextra -Wundef
> -Wfloat-equal -Wshadow -Wbad-function-cast -Wdeclaration-after-statement
> -Wc++-compat -Winline -Wno-long-long -Wno-variadic-macros -Wdocumentation
> -m64 src/rttherm/CMakeFiles/rttherm.dir/spectrum.c.o
> src/rttherm/CMakeFiles/rttherm.dir/viewtherm.c.o  -o bin/rttherm
> -Wl,-rpath,/wrkdirs/usr/ports/cad/brlcad/work/.build/lib:/usr/local/lib:
> lib/libged.so.20.0.1 lib/librtuif_multispectral.a
> lib/libmultispectral.so.20.0.1 lib/libfb.so.20.0.1 lib/libpkg.so.20.0.1
> /usr/local/lib/libSM.so /usr/local/lib/libICE.so /usr/local/lib/libGLU.so
> /usr/local/lib/libGL.so /usr/local/lib/libSM.so /usr/local/lib/libICE.so
> /usr/local/lib/libGLU.so /usr/local/lib/libGL.so lib/libtk.so.8.5
> /usr/local/lib/libX11.so /usr/local/lib/libXext.so lib/libtkstub.a
> lib/libtclstub.a /usr/local/lib/libXrender.so lib/libwdb.so.20.0.1
> lib/libicv.so.20.0.1 lib/libpng16.so.16.29.0 lib/libnetpbm.so
> lib/libanalyze.so.20.0.1 lib/libtcl.so.8.5.19 lib/libclipper.so.4.6.0
> lib/librt.so.20.0.1 lib/libnmg.so lib/libgdiam.so lib/libvds.so.1.0.1
> lib/libbrep.so.20.0.1 lib/libbg.so.20.0.1 lib/libopenNURBS.so.2012.10.245
> lib/libp2t.so.1.0.1 lib/libz.so.1.2.11 lib/libtinycthread.so lib/liblz4.so
> lib/libbn.so.20.0.1 lib/libbu.so.20.0.1 lib/libregex.so.1.0.4 -lm -pthread
> -ldl && :
> /usr/bin/ld: error: undefined symbol: main
>>>> referenced by crt1.c:74
> (/usr/local/poudriere/jails/amd64_cur/usr/src/lib/csu/amd64/crt1.c:74)
>>>>               /usr/lib/crt1.o:(_start)
> cc: error: linker command failed with exit code 1 (use -v to see invocation)
> ninja: build stopped: subcommand failed.
> *** Error code 1

It looks like you are trying to build an executable, but none of the
source files (viewtherm.c or spectrum.c) for the executable contain a
main() function.

Here is simple example showing how to reproduce this error:

%cat test.c
void
test()
{
}
%cc -o test test.c
/usr/bin/ld: error: undefined symbol: main
>>> referenced by crt1.c:74 (/usr/src/lib/csu/amd64/crt1.c:74)
>>>               /usr/lib/crt1.o:(_start)
cc: error: linker command failed with exit code 1 (use -v to see invocation)