I am compiling mupdf with a custom version of some functions in mupdf library. There are two functions that seem to call each other so when I create the _custom version of them an error is issued at compile time.
pc#pc:~/sviluppo/mupdf-0.9$ make
CC build/debug/obj_print.o
fitz/obj_print.c: In function ‘fmt_array_custom’:
fitz/obj_print.c:191:4: warning: implicit declaration of function ‘fmt_obj_custom’
fitz/obj_print.c: At top level:
fitz/obj_print.c:304:13: warning: conflicting types for ‘fmt_obj_custom’
fitz/obj_print.c:304:13: error: static declaration of ‘fmt_obj_custom’ follows non-static declaration
fitz/obj_print.c:191:4: note: previous implicit declaration of ‘fmt_obj_custom’ was here
make: *** [build/debug/obj_print.o] Errore 1
What's wrong? the default version of the functions already call each other the same way.
In line 191, the function fmt_array_custom is called without prior declaration. So the compiler implicitly assumes a declaration (non-static).
Later in line 304, it sees the actual function declaration/definition which is static. This is a conflict.
For fixing this you can add a declaration before line 191. Just copy the function proto-type (without the body) from line 304.
Related
While compiling code for softiwarp using this guide
I encountered the following errors while compile codes in kernel directory.
error: implicit declaration of function ‘remap_vmalloc_range’
error: implicit declaration of function ‘vmalloc’
error: implicit declaration of function ‘vmalloc_user’
error: implicit declaration of function ‘vfree’
Anyone here could help guide me, how to install the libraries related to this function? I'm using ubuntu 16.04.
These functions are declared in <linux/vmalloc.h>. You need to #include that header.
l made a C program and l want to compile it using shell forge but I had several errors, how can I solve them?
Errors
##[ERROR]## compiler reported error 1 while compiling /tmp/sfvLvXlY/sonu.c
##[ERROR]## In file included from :1:
././sflib/linux_amd64/sflib.h:93: warning: "struct rusage" declared inside parameter list
././sflib/linux_amd64/sflib.h:93: warning: its scope is only this definition or declaration, which is probably not what you want
././sflib/linux_amd64/sflib.h:97: warning: "struct sembuf" declared inside parameter list
In file included from /usr/include/stdio.h:34,
from /tmp/sfvLvXlY/sonu.c:3:
/usr/lib/gcc/x86_64-redhat-linux/3.4.6/include/stddef.h:213: error: conflicting types for 'size_t'
././sflib/linux_amd64/../common/sftypes.h:25: error: previous declaration of 'size_t' was here
I'm trying to build a kernel with some patches that affect the same files and have a problem.
While building, i get an error:
arch/x86/include/asm/uaccess_64.h: In function 'copy_from_user': arch/x86/include/asm/uaccess_64.h:81:2: error: implicit declaration of function 'cond_resched' [-Werror=implicit-function-declaration]
At first i followed the code and found out that the pointed string is:
if (access_ok(VERIFY_READ, from, n))
access_ok(...) is a macro from file uaccess.h, that does include cond_resched() call.
Actual cond_resched() call is defined in linux/sched.h and is #included into uaccess.h file. Also i tried to include it into uaccess_64.h file but it doesn't help. So i'm out of ideas how it could be implicitly declared.
I am a newbie to C/Pro*C
I compile a C code in Linux. I get the following error.
/usr/include/sys/proc.h:560: error: conflicting types for 'exit'
/usr/include/sys/proc.h:560: error: conflicting types for 'exit'
In proc.h, exit function is defined as
extern void exit(int, int);
The header proc.h is an OS defined header and I have no idea why I get this error.
If there is a conflicting type, it is as well defined elsewhere, probably with a different type - either as a function with a different signature, or as a variable.
Check if this is the case, and if so, rename your variable.
I'm rather new to coding but when compiling ( I use putty and SHH ) i receive this error
act.offensive.c:631: warning: incompatible implicit declaration of built-in function âabortâ
act.offensive.c:637: warning: incompatible implicit declaration of built-in function âabortâ
On lines 631 and 637
CREATE (lodged->next, LODGED_OBJECT_INFO, 1);
CREATE (target->lodged, LODGED_OBJECT_INFO, 1);
I did a search for aaborta and abort through the files in the SRC (for the compile) directory and did not find a match anywhere to explain it or find the file to index it to.
I was wondering if someone might be able to help me
You could try including <stdlib.h> in the file where the built-in function abort is declared.
The error message says about incompatible implicit declaration, so it might be that there's no explicit declaration anywhere in your code and the macro CREATE (I believe it's a macro?) tries to use it.
If that doesn't help, it'd be helpful if you could edit your question and describe what's CREATE in your code.