Re: порядок аргументов gcc
On 04/09/2020 14:27, Stanislav Maslovski wrote:
Попробуй сделать
gcc --verbose usbtest.c -lusb
и
gcc --verbose -lusb usbtest.c
и сравни вывод.
одинаковый, за исключением названий файлов и порядка -lusb
% diff a b
12c12
< /usr/lib/gcc/x86_64-linux-gnu/10/cc1 -quiet -v -imultiarch
x86_64-linux-gnu usbtest.c -quiet -dumpbase usbtest.c -mtune=generic
-march=x86-64 -auxbase usbtest -version -fasynchronous-unwind-tables -o
/tmp/cckRKCS2.s
---
> /usr/lib/gcc/x86_64-linux-gnu/10/cc1 -quiet -v -imultiarch
x86_64-linux-gnu usbtest.c -quiet -dumpbase usbtest.c -mtune=generic
-march=x86-64 -auxbase usbtest -version -fasynchronous-unwind-tables -o
/tmp/ccXYg8d9.s
35c35
< as -v --64 -o /tmp/ccpmsdG2.o /tmp/cckRKCS2.s
---
> as -v --64 -o /tmp/cc1hEI67.o /tmp/ccXYg8d9.s
40,41c40,43
< /usr/lib/gcc/x86_64-linux-gnu/10/collect2 -plugin
/usr/lib/gcc/x86_64-linux-gnu/10/liblto_plugin.so
-plugin-opt=/usr/lib/gcc/x86_64-linux-gnu/10/lto-wrapper
-plugin-opt=-fresolution=/tmp/ccgVq9u2.res
-plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lgcc_s
-plugin-opt=-pass-through=-lc -plugin-opt=-pass-through=-lgcc
-plugin-opt=-pass-through=-lgcc_s --build-id --eh-frame-hdr -m
elf_x86_64 --hash-style=gnu --as-needed -dynamic-linker
/lib64/ld-linux-x86-64.so.2 -pie
/usr/lib/gcc/x86_64-linux-gnu/10/../../../x86_64-linux-gnu/Scrt1.o
/usr/lib/gcc/x86_64-linux-gnu/10/../../../x86_64-linux-gnu/crti.o
/usr/lib/gcc/x86_64-linux-gnu/10/crtbeginS.o
-L/usr/lib/gcc/x86_64-linux-gnu/10
-L/usr/lib/gcc/x86_64-linux-gnu/10/../../../x86_64-linux-gnu
-L/usr/lib/gcc/x86_64-linux-gnu/10/../../../../lib
-L/lib/x86_64-linux-gnu -L/lib/../lib -L/usr/lib/x86_64-linux-gnu
-L/usr/lib/../lib -L/usr/lib/gcc/x86_64-linux-gnu/10/../../..
/tmp/ccpmsdG2.o -lusb -lgcc --push-state --as-needed -lgcc_s --pop-state
-lc -lgcc --push-state --as-needed -lgcc_s --pop-state
/usr/lib/gcc/x86_64-linux-gnu/10/crtendS.o
/usr/lib/gcc/x86_64-linux-gnu/10/../../../x86_64-linux-gnu/crtn.o
< COLLECT_GCC_OPTIONS='-v' '-mtune=generic' '-march=x86-64'
---
> /usr/lib/gcc/x86_64-linux-gnu/10/collect2 -plugin
/usr/lib/gcc/x86_64-linux-gnu/10/liblto_plugin.so
-plugin-opt=/usr/lib/gcc/x86_64-linux-gnu/10/lto-wrapper
-plugin-opt=-fresolution=/tmp/ccblo7B9.res
-plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lgcc_s
-plugin-opt=-pass-through=-lc -plugin-opt=-pass-through=-lgcc
-plugin-opt=-pass-through=-lgcc_s --build-id --eh-frame-hdr -m
elf_x86_64 --hash-style=gnu --as-needed -dynamic-linker
/lib64/ld-linux-x86-64.so.2 -pie
/usr/lib/gcc/x86_64-linux-gnu/10/../../../x86_64-linux-gnu/Scrt1.o
/usr/lib/gcc/x86_64-linux-gnu/10/../../../x86_64-linux-gnu/crti.o
/usr/lib/gcc/x86_64-linux-gnu/10/crtbeginS.o
-L/usr/lib/gcc/x86_64-linux-gnu/10
-L/usr/lib/gcc/x86_64-linux-gnu/10/../../../x86_64-linux-gnu
-L/usr/lib/gcc/x86_64-linux-gnu/10/../../../../lib
-L/lib/x86_64-linux-gnu -L/lib/../lib -L/usr/lib/x86_64-linux-gnu
-L/usr/lib/../lib -L/usr/lib/gcc/x86_64-linux-gnu/10/../../.. -lusb
/tmp/cc1hEI67.o -lgcc --push-state --as-needed -lgcc_s --pop-state -lc
-lgcc --push-state --as-needed -lgcc_s --pop-state
/usr/lib/gcc/x86_64-linux-gnu/10/crtendS.o
/usr/lib/gcc/x86_64-linux-gnu/10/../../../x86_64-linux-gnu/crtn.o
> /usr/bin/ld: /tmp/cc1hEI67.o: in function `main':
> usbtest.c:(.text+0x5): undefined reference to `usb_init'
> collect2: error: ld returned 1 exit status
zsh: exit 1 diff a b
--
sergio.
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