Re: порядок аргументов gc c

On 04/09/2020 14:27, Stanislav Maslovski wrote:

> п÷п╬п©я─п╬п╠я┐п╧ я│п╢п╣п╩п╟я┌я▄
> 
> gcc --verbose usbtest.c -lusb
> 
> п╦
> 
> gcc --verbose -lusb usbtest.c
> 
> п╦ я│я─п╟п╡п╫п╦ п╡я▀п╡п╬п╢.

п╬п╢п╦п╫п╟п╨п╬п╡я▀п╧, п╥п╟ п╦я│п╨п╩я▌я┤п╣п╫п╦п╣п╪ п╫п╟п╥п╡п╟п╫п╦п╧ я└п╟п╧п╩п╬п╡ п╦ п©п╬я─я▐п╢п╨п╟ -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