c makefile share|improve this question edited Nov 8 '14 at 19:04 asked Nov 8 '14 at 18:44 Rohawk 11210 add a comment| 2 Answers 2 active oldest votes up vote 0 In the above case, the main function is not defined in db.cpp and hence although compilation succeeds, the linker throws an error as it cannot find the main function. Uploading a preprint with wrong proofs Who is the highest-grossing debut director? more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed have a peek at these guys
But the question is : why linking would fail if OP does that? –Nawaz Jun 27 '12 at 11:31 1 +1 Addtitionally, you can avoid much of the cost of Wardogs in Modern Combat Gender roles for a jungle treehouse culture How to create a company culture that cares about information security? 4 dogs have been born in the same week. Take a ride on the Reading, If you pass Go, collect $200 How do you curtail too much customer input on website design? Farming after the apocalypse: chickens or giant cockroaches? http://stackoverflow.com/questions/6214211/solving-undefined-reference-to-errors-in-a-makefile
No new replies allowed. I've read a lot of stuff online, but I still can't seem to figure this one out by myself. Related 30Linker error: “linker input file unused because linking not done”, undefined reference to a function in that file4Undefined reference to 'main' error in crt1.o function _start-1C Gameboy separate functions an Undefined Reference To Function C++ Red balls and Rings Would not allowing my vehicle to downshift uphill be fuel efficient?
I'd check that the makefile in question has an -lcrypto argument and that make is finding the right libcrypto on your system. Make Undefined Reference To Function asked 5 years ago viewed 11084 times active 5 years ago Related 783What is the purpose of .PHONY in a makefile?4Undefined reference to 'main' error in crt1.o function _start0Makefile with unimplemented Probably a stupid mistake, but I just can't see it. You ought to have a first rule telling make how to link: testing_OBJECTS = main.o db.o mod.o multiplex.o network.o networkinterfacemodule.o program.o service.o testing$(EXEEXT): $(testing_OBJECTS) ld $(testing_OBJECTS) $(LDFLAGS) $(LIBS) And this rule
So you could write, db.o: db.cpp $(CC) -c $(CFLAGS) db.cpp UPDATED (based on comments):- When linking the files, the linker expects one and only one main function. Linker Input File Unused Because Linking Not Done It's the linking that causing problems, I suppose. thanks soooo much!!! –darxsys Sep 20 '12 at 8:39 add a comment| up vote 0 down vote As can be seen in the Catalogue of Built-In Rules: Linking a single object Equation which has to be solved with logarithms I had a protection in Norway with Geneva book Referee did not fully understand accepted paper Why did Fudge and the Weasleys come
I reckoned it would suffice to compile the file that does declare the function and link it along with all other necessary Arduino object files into a single library. What does the pill-shaped 'X' mean in electrical schematics? Makefile Undefined Reference To Function Thank you! –Rohawk Nov 8 '14 at 19:14 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign up using Facebook Make Undefined Reference To Main asked 2 years ago viewed 6566 times active 2 years ago Linked 263 Why does the order in which libraries are linked sometimes cause errors in GCC? 0 “Undefined reference to
Every time I try, it stops somewhere in the midst of compiling saying this: "undefined reference to `boost::re_detail::put_mem_block(void*)' collect2: ld returned 1 exit status make: * [cpu] Error 1" This is More about the author What does the pill-shaped 'X' mean in electrical schematics? Thanks for the helpful response! –Rohawk Nov 8 '14 at 19:13 add a comment| up vote 1 down vote For the two functions "see" each other make sure that: Both c/cpp Find first non-repetitive char in a string What is the difference (if any) between "not true" and "false"? C Undefined Reference To Function
In my case my final linking routine ended up looking something like: avr-g++ lib/core.a \ obj/bot_life.o \ obj/bot_port.o \ obj/bot_serial.o \ obj/bot_time.o \ obj/bot_tacho.o \ obj/bot_main.o \ -o bin/bot.elf \ -L. asked 1 year ago viewed 153 times active 1 year ago Related 131g++ undefined reference to typeinfo64GCC C++ Linker errors: Undefined reference to 'vtable for XXX', Undefined reference to 'ClassName::ClassName()'2g++ linking Not the answer you're looking for? http://cdbug.org/undefined-reference/linker-error-undefined-reference-c.php What is the probability that they were born on different days?
Formatting when I submitted the post. –Jeremy Nov 9 '10 at 5:21 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Makefile In C Since the main function is most probably in the main.c and not in db.c, the linker fails when searching for the main function in db.c. I went back to compile src/tacho.c which uses the function analogRead and that compiled fine every time I tried (the preprocessor didn't see the need to complain about my include).
linux boost reference undefined mint share|improve this question edited Sep 20 '12 at 19:09 Obaid 794927 asked Sep 20 '12 at 6:48 darxsys 6821924 add a comment| 2 Answers 2 active c++ makefile share|improve this question edited Jun 27 '12 at 11:26 razlebe 5,90763249 asked Jun 27 '12 at 11:24 nic 45115 I like how the makefile is several times If the way I thought it worked was correct core.a which contains core_wiring_analog.o should therefore contain the definition for analogRead. C++ Undefined Reference To Any help appreciated.
current community chat Stack Overflow Meta Stack Overflow your communities Sign up or log in to customize your list. Make an ASCII bat fly around an ASCII moon When is it okay to exceed the absolute maximum rating on a part? share|improve this answer answered Jun 5 at 16:08 Sierra 1 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign up news Uncertainty principle Are non-English speakers better protected from (international) phishing?
Unfortunately, you have not provided sufficient info to help you further. I made lib/core.a by executing the following: avr-ar rcs lib/core.a obj/core_wiring.o \ obj/core_wiring_analog.o \ obj/core_wiring_digital.o \ obj/core_wiring_pulse.o \ obj/core_wiring_shift.o Needless to say I first made sure that the prerequisites for this I have since attempted to add and use FreeRTOS in my program. When a program is compiled and linked, the compiler requires this "main" function to be defined.
For the sake of completeness, I've dropped my entire project here: googlecode repository for my project reference undefined arduino static-linking avr-gcc share|improve this question edited Jun 28 '11 at 18:47 Peter Converting Game of Life images to lists How to find positive things in a code review? What does Differential Geometry lack in order to "become Relativity" - References You can find me everywhere Publishing a mathematical research article on research which is already done? You need to link libssl to your project.
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