Manually compile using gcc -v
Is it possible to compile a simple Hello World program that only uses provided gcc/glibc files rather than using the default ones provided by the OS ? (Therefore, when executed, the program will only use the provided files rather than the ones the OS provides.) I've looked everywhere on the net but cannot get any to work:
I tried to manually do what this does gcc -v simple.c but I cannot repro开发者_如何学运维duce it myself.
This is what I tried: (all provided files are on the Desktop)
/home/myuser/Desktop/cc1 -quiet -v simple.c -quiet -dumpbase simple.c -mtune=generic -auxbase simple -version -o /tmp/temp1.s
How can the below paths be changed to custom ones rather than default ones ?
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu" ignoring nonexistent directory "/usr/lib/gcc/x86_64-linux-gnu/4.4.5/../../../../x86_64-linux-gnu/include" #include "..." search starts here: #include search starts here: /usr/local/include /usr/lib/gcc/x86_64-linux-gnu/4.4.5/include /usr/lib/gcc/x86_64-linux-gnu/4.4.5/include-fixed /usr/include/x86_64-linux-gnu /usr/include End of search list. GNU C (Debian 4.4.5-8) version 4.4.5 (x86_64-linux-gnu) compiled by GNU C version 4.4.5, GMP version 4.3.2, MPFR version 3.0.0-p3. GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 Compiler executable checksum: dac4d891d068d1bed01868869b00bd17
as -V -Qy -o /tmp/temp2.o /tmp/temp1.s
GNU assembler version 2.20.1 (x86_64-linux-gnu) using BFD version (GNU Binutils for Debian) 2.20.1-system.20100303
/home/myuser/Desktop/collect2 --build-id --eh-frame-hdr -m elf_x86_64 --hash-style=both -dynamic-linker ld-2.11.2.so crt1.o crti.o crtbegin.o /tmp/temp2.o libgcc.a --as-needed libgcc_s.so.1 --no-as-needed libc.a libgcc_s.so.1 --as-needed libgcc.a --no-as-needed crtend.o crtn.o
Why is the below /usr/bin/ld used instead of the provided ld-2.11.2.so ?
/usr/bin/ld: dynamic STT_GNU_IFUNC symbol `strcmp' with pointer equality in `libc.a(strcmp.o)' can not be used when making an executable; recompile with -fPIE and relink with -pie collect2: ld returned 1 exit status
Can anybody modify it to work ?
-v
shows you the actions performed by the compiler driver. It does not affect what standard libraries you get.
To run with all custom libraries, use -nostdlib
.
How can the below paths be changed to custom ones rather than default ones ?
Simply add -I path
to the compiler call. This path will be added before the internal paths.
Why is the below /usr/bin/ld used instead of the provided ld-2.11.2.so ?
The first one is an executable binary, the second one is a shared object. You can't use a shared object in a place of a binary.
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