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gcc linker error Waddington, New York

Radius of Convergence of Infinite Series Why can't we use the toilet when the train isn't moving? The problem is often that the variable is simply misspelled. You'll generally want to look for how to tell the compiler where to look for libraries and make sure that the libraries were actually installed correctly. No Library To understand this issue, remember that a header file (.h) is not a library.

The paths can also be specified in a link script with the "SEARCH_DIR" command. The default dynamic linker is normally correct; don't use this unless you know what you are doing. --fatal-warnings --no-fatal-warnings Treat all warnings as errors. It's designed to be run to test the library so it doesn't matter as long as it works after it has been built. –Matthew Mitchell Sep 5 '12 at 0:13 This is only meaningful when generating dynamically linked ELF executables.

In the command I use the -L, -l and -rpath options which I thought was all that is needed for linking in linux. You can list the available emulations with the --verbose or -V options. If the linker finds an object with an audit entry while searching for shared libraries, it will add a corresponding "DT_DEPAUDIT" entry in the output file. Normally the linker will generate an error message for each reported unresolved symbol but the option --warn-unresolved-symbols can change this to a warning. --dll-verbose --verbose Display the version number for ld

Specifies a list of object files or archive members, from which symbols should not be automatically exported, but which should be copied wholesale into the import library being generated during the The default behaviour from release 2.14 onwards is to reject such input files, and so the --accept-unknown-input-arch option has been added to restore the old behaviour. --as-needed --no-as-needed This option affects This option also has an effect on the resolution of symbols in dynamic libraries. When compiling an individual source file without a main function, use the option -c (see section 2.4.1 Creating object files from source files). <<< previous table of contents next >>> ISBN

All this for a single character! This also keeps me from having to type the word, which could result in my correctly spelling the variable name. These can often be more frustrating because they aren't necessarily the result of something written in your program. You have called a function and you did not send it enough arguments.

Similarly reducing this value can reduce the memory requirements at the expense of speed. --hash-style=style Set the type of linker's hash table(s). There are two pieces of good news though. linux gcc build linker share|improve this question edited Sep 5 '12 at 0:19 choroba 106k1089146 asked Sep 5 '12 at 0:01 Matthew Mitchell 1,48764789 Are you sure you want Your compiler may also warn you about using variables that haven't been initialized and other similar mistakes.

Undefined symbols in shared libraries are still allowed. If your compiler should support the function, then fixing this problem usually requires compiler-specific settings. Thus the filter object can be used to select a subset of the symbols provided by the object name. This is not done however if the --hash-size switch has been used.

This option is useful when using unmodified Unix makefiles on a Microsoft Windows host, since some versions of Windows won't run an image unless it ends in a ".exe" suffix. --gc-sections Turning a common symbol into a reference, because there is already a definition for the symbol. (

): warning: common of `' overridden by definition (
): warning: defined here 2. What's going on here? What happens if one brings more than 10,000 USD with them in the US?

This option is only fully supported on ELF platforms which support shared libraries; see VERSION . If you get an error indicating that your class is a "non-aggregate type", then the compiler has not seen your class definition and doesn't recognize your class as such. e_atan2.o: 00000000 T atan2 e_asinf.o: 00000000 T asinf e_asin.o: 00000000 T asin To see the library path that your compiler uses and which libraries it loads by default you can invoke A linked file may be changed later by other tools, but the build ID bit string identifying the original linked file does not change.

Provided for compatibility with other tools. -G value --gpsize=value Set the maximum size of objects to be optimized using the GP register to size. The symbols are printed out, sorted by name. Run time errors can be logic errors that cause your program to produce bad output or they can be fatal errors that crash your program when you run it. It is not intended to be compared as a checksum for the file's contents.

This can be hard when you're just starting out, but if you pay attention to the messages and try to pick out what they could mean, you'll quickly get used to The default behaviour can be restored with the option --no-fatal-warnings. --force-exe-suffix Make sure that an output file has a .exe suffix. This brings up another guiding principle of hunting down compiler errors: when in doubt, look earlier in the program. ostream copy constructor is private Example /usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.2.1/include/c++/bits/ios_base.h: In copy constructor `std::basic_ios::basic_ios(const std::basic_ios&)': /usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.2.1/include/c++/bits/ios_base.h:424: `std::ios_base::ios_base(const std::ios_base&)' is private mil.cpp:28: within this context mil.cpp: In function `int main()': mil.cpp:28:

The difference between -rpath and -rpath-link is that directories specified by -rpath options are included in the executable and used at runtime, whereas the -rpath-link option is only effective at link The specified archives are searched repeatedly until no new undefined references are created. The brief message here is quite helpful because it says exactly what was wrong. ignore-in-shared-libs Report unresolved symbols that come from regular object files, but ignore them if they come from shared libraries.

It is ignored on targets that do not support this option. You may use this option multiple times on the command line: it affects library searching for -l options which follow it. -Bgroup Set the "DF_1_GROUP" flag in the "DT_FLAGS_1" entry in Meaning of "oh freak" If Dumbledore is the most powerful wizard (allegedly), why would he work at a glorified boarding school? ostreams must be passed by reference. comparison between signed and unsigned integer expressions Example xyz.cpp: In function `int main()': zyz.cpp:54: warning: comparison between signed and unsigned integer expressions Meaning This

Let me share some info on the problem: I'm cross compiling with gcc for C. The name of the "missing" function is the first word of line 3 of the error message (main). gcc) then all the linker command line options should be prefixed by -Wl, (or whatever is appropriate for the particular compiler driver) like this: gcc -Wl,--start-group foo.o bar.o -Wl,--end-groupThis is important, int i; A common symbol.

So my thought is it might be the order in which I include the library files, but i'm not sure what is the correct way to order them. Nevertheless, compiler warnings aren't going to stop you from getting your program working (unless you tell your compiler to treat warnings as errors), so they're probably a bit less frustrating than