Re: make failing in custom code
Hi, On Thu, Sep 27, 2018 at 4:31 PM, Tapas Mishra wrote: > Hi, > I am trying to do a project when I do a make on project code > in cygwin environment I get following error > > gcc -Wall -g -c main.c -o main.o > main.c: In function ‘main’: > main.c:50:8: warning: unused variable ‘physmem’ [-Wunused-variable] > char *physmem = page_table_get_physmem(pt); > ^~~ > gcc -Wall -g -c page_table.c -o page_table.o > page_table.c: In function ‘page_table_set_entry’: > page_table.c:125:2: warning: implicit declaration of function > ‘remap_file_pages’ [-Wimplicit-function-declaration] > remap_file_pages(pt->virtmem+page*PAGE_SIZE,PAGE_SIZE,0,frame,0); > ^~~~ > gcc -Wall -g -c disk.c -o disk.o > gcc -Wall -g -c program.c -o program.o > gcc main.o page_table.o disk.o program.o -o virtmem > page_table.o: In function `page_table_set_entry': > /home/DEEL/cs602/try1/page_table.c:125: undefined reference to > `remap_file_pages' > /home/DEEL/cs602/try1/page_table.c:125:(.text+0x491): relocation > truncated to fit: R_X86_64_PC32 against undefined symbol > `remap_file_pages' > collect2: error: ld returned 1 exit status > make: *** [makefile:2: virtmem] Error 1 > > I compiled the same code on a linux instance hosted on amazon cloud > and it compiled successfully. So this brought me to a conclusion some > files are missing in cygwin and hence I reached here. remap_file_pages is a Linux system call: http://man7.org/linux/man-pages/man2/remap_file_pages.2.html It is not implemented on Cygwin. Csaba -- You can get very substantial performance improvements by not doing the right thing. - Scott Meyers, An Effective C++11/14 Sampler So if you're looking for a completely portable, 100% standards-conformat way to get the wrong information: this is what you want. - Scott Meyers (C++TDaWYK) -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
Re: make failing in custom code
Tapas Mishra wrote: Hi, I am trying to do a project when I do a make on project code in cygwin environment I get following error gcc -Wall -g -c main.c -o main.o main.c: In function ‘main’: main.c:50:8: warning: unused variable ‘physmem’ [-Wunused-variable] char *physmem = page_table_get_physmem(pt); ^~~ gcc -Wall -g -c page_table.c -o page_table.o page_table.c: In function ‘page_table_set_entry’: page_table.c:125:2: warning: implicit declaration of function ‘remap_file_pages’ [-Wimplicit-function-declaration] remap_file_pages(pt->virtmem+page*PAGE_SIZE,PAGE_SIZE,0,frame,0); ^~~~ gcc -Wall -g -c disk.c -o disk.o gcc -Wall -g -c program.c -o program.o gcc main.o page_table.o disk.o program.o -o virtmem page_table.o: In function `page_table_set_entry': /home/DEEL/cs602/try1/page_table.c:125: undefined reference to `remap_file_pages' /home/DEEL/cs602/try1/page_table.c:125:(.text+0x491): relocation truncated to fit: R_X86_64_PC32 against undefined symbol `remap_file_pages' collect2: error: ld returned 1 exit status make: *** [makefile:2: virtmem] Error 1 I compiled the same code on a linux instance hosted on amazon cloud and it compiled successfully. So this brought me to a conclusion some files are missing in cygwin and hence I reached here. I glanced at your pastebin files briefly. These warnings and errors appear to be garden variety coding issues. Nothing Cygwin-specific that I can see. The first warning is that you've defined physmem but aren't using that definition anywhere in the same function. The second warning tells that you haven't defined remap_file_pages() at any point before it's used in that source file. It needs to be defined before use in that file, or in a header file #included before use. And the error message is messily saying remap_file_pages() wasn't defined in any of the object files you're linking. Dunno how this could work as-is anywhere :-). Minor tweaks should fix it. ..mark -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
make failing in custom code
Hi, I am trying to do a project when I do a make on project code in cygwin environment I get following error gcc -Wall -g -c main.c -o main.o main.c: In function ‘main’: main.c:50:8: warning: unused variable ‘physmem’ [-Wunused-variable] char *physmem = page_table_get_physmem(pt); ^~~ gcc -Wall -g -c page_table.c -o page_table.o page_table.c: In function ‘page_table_set_entry’: page_table.c:125:2: warning: implicit declaration of function ‘remap_file_pages’ [-Wimplicit-function-declaration] remap_file_pages(pt->virtmem+page*PAGE_SIZE,PAGE_SIZE,0,frame,0); ^~~~ gcc -Wall -g -c disk.c -o disk.o gcc -Wall -g -c program.c -o program.o gcc main.o page_table.o disk.o program.o -o virtmem page_table.o: In function `page_table_set_entry': /home/DEEL/cs602/try1/page_table.c:125: undefined reference to `remap_file_pages' /home/DEEL/cs602/try1/page_table.c:125:(.text+0x491): relocation truncated to fit: R_X86_64_PC32 against undefined symbol `remap_file_pages' collect2: error: ld returned 1 exit status make: *** [makefile:2: virtmem] Error 1 I compiled the same code on a linux instance hosted on amazon cloud and it compiled successfully. So this brought me to a conclusion some files are missing in cygwin and hence I reached here. so let me know what could be missing. If it is possible to know from above error The code is mostly signal handling virtual memory implementation in userspace level and handling of block files etc no where it deals with kernel etc. So I hope it should work in cygwin environment. The code on which make is executing can be read/seen here disk.c https://pastebin.com/uywHhbKZ disk.h https://pastebin.com/cXKkDifg main.c https://pastebin.com/z7xakvz5 page_table.c https://pastebin.com/WpVgB9Fh page_table.h https://pastebin.com/Lur8uJXN program.c https://pastebin.com/5giXardt program.h https://pastebin.com/eiyfSNem makefile https://pastebin.com/Axi9gtFa --- Thanks -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
