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From: "ohaiziejohwahkeezuoz at xff dot cz" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug driver/90392] [9/10 Regression] Assertion failure in
 ldlang.c:6868 when compiling with -flto
Date: Wed, 01 Apr 2020 11:14:26 +0000
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X-Bugzilla-Keywords: lto
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D90392

--- Comment #11 from ohaiziejohwahkeezuoz at xff dot cz ---
Try this:

touch a.a a.o
gcc -save-temps -Wl,-debug -o a a.o a.a -ldl

Outputs:

...

/usr/bin/ld -plugin /usr/lib/gcc/x86_64-pc-linux-gnu/9.3.0/liblto_plugin.so
-plugin-opt=3D/usr/lib/gcc/x86_64-pc-linux-gnu/9.3.0/lto-wrapper
-plugin-opt=3D-fresolution=3D-ldl.res -plugin-opt=3D-pass-through=3D-lgcc
-plugin-opt=3D-pass-through=3D-lgcc_s -plugin-opt=3D-pass-through=3D-lc
-plugin-opt=3D-pass-through=3D-lgcc -plugin-opt=3D-pass-through=3D-lgcc_s -=
-build-id
--eh-frame-hdr --hash-style=3Dgnu -m elf_x86_64 -dynamic-linker
/lib64/ld-linux-x86-64.so.2 -pie -o a
/usr/lib/gcc/x86_64-pc-linux-gnu/9.3.0/../../../../lib/Scrt1.o
/usr/lib/gcc/x86_64-pc-linux-gnu/9.3.0/../../../../lib/crti.o
/usr/lib/gcc/x86_64-pc-linux-gnu/9.3.0/crtbeginS.o
-L/usr/lib/gcc/x86_64-pc-linux-gnu/9.3.0
-L/usr/lib/gcc/x86_64-pc-linux-gnu/9.3.0/../../../../lib -L/lib/../lib
-L/usr/lib/../lib -L/usr/lib/gcc/x86_64-pc-linux-gnu/9.3.0/../../.. a.o a.a
-ldl -lgcc --push-state --as-needed -lgcc_s --pop-state -lc -lgcc --push-st=
ate
--as-needed -lgcc_s --pop-state
/usr/lib/gcc/x86_64-pc-linux-gnu/9.3.0/crtendS.o
/usr/lib/gcc/x86_64-pc-linux-gnu/9.3.0/../../../../lib/crtn.o
/usr/bin/ld: /usr/lib/gcc/x86_64-pc-linux-gnu/9.3.0/../../../../lib/Scrt1.o=
: in
function `_start':
(.text+0x24): undefined reference to `main'


Notice the: ... -plugin-opt=3D-fresolution=3D-ldl.res ...=