I have 3 questions :- I am using winarm based on GCC 4.0.2 1) I am using mktime and gmtime_r functions in my code. They build fine but do not link. I know this is down to a missing library, but which library do I need ? here is my current makefile linker code #LIBS = --start-group -lc -lm -lgcc -lstdc++ --end-group LIBS = --start-group -lc -lm -lstdc++ --end-group LFLAGS = -nostartfiles $(LIBS) -Map $(NAME).map -T$(LINK) 2) If I include the lstdc++ in a pure C project does it create any overhead ? 3) The lpc_2129_newlib_cpp_20050820.zip demo has the following in the make file #Support for newlibc-lpc (file: libnewlibc-lpc.a) NEWLIBLPC = -lnewlib-lpc ... # Linker flags. # -Wl,...: tell GCC to pass this to linker. # -Map: create map file # --cref: add cross reference to map file LDFLAGS = -nostartfiles -Wl,-Map=$(TARGET).map,--cref LDFLAGS += -lc LDFLAGS += $(NEWLIBLPC) $(MATH_LIB) LDFLAGS += -lc -lgcc LDFLAGS += $(CPLUSPLUS_LIB) Where do I find the ibnewlibc-lpc.a in the Winarm package ? All the best, and thanks to the people behind WinARM for a great project!!!
Fordp wrote: (Personaly I realy prefer real full names. Anyway:) > 1) I am using mktime and gmtime_r functions in my code. They build fine > but do not link. I know this is down to a missing library, but which > library do I need ? > > here is my current makefile linker code > > #LIBS = --start-group -lc -lm -lgcc -lstdc++ --end-group > LIBS = --start-group -lc -lm -lstdc++ --end-group > LFLAGS = -nostartfiles $(LIBS) -Map $(NAME).map -T$(LINK) Not enough information. Please give the error-message, create a simple example-application and place it somewhere on an internet-server. AFAIK some time-functions use a syscall to interface with the hardware, sometimes just providing a dummy-syscall is enough to make the linker "happy". > 2) If I include the lstdc++ in a pure C project does it create any > overhead ? You can simple try yourself. Create and check the map-file for changes after make clean all with an without the c++ library-option. When using makefiles based on the WinARM-template (which is based on the WinAVR-template) the summary of the memory-usage is part of the output of make all. > 3) The lpc_2129_newlib_cpp_20050820.zip demo has the following in the > make file > ... > Where do I find the ibnewlibc-lpc.a in the Winarm package ? Suggestion: Find it by searching for the file-name. Start->Search->Files->search in c:\WinARM, seach for libnewlib-lpc.a (==>arm-elf/lib/). You might want to read the readme.file for WinARM 3/06 even if you are using an older version. The location of the library is mentioned two times in this readme since it has been a FAQ. (I wonder how many people do not know about the file-search function in Windows). Martin Thomas
> #LIBS = --start-group -lc -lm -lgcc -lstdc++ --end-group > LIBS = --start-group -lc -lm -lstdc++ --end-group > LFLAGS = -nostartfiles $(LIBS) -Map $(NAME).map -T$(LINK) You have commented out the version of LIBS that links libgcc.a - why would you do that? If the linker only links object code from a library if it is required to resolve a symbol. Therefore if you have not used C++ the presence of libstdc++ will not affect the final code. It could conceivably extend the build marginally time if the linker has to iterate the group more than once. Clifford
Martin Thomas wrote: > Not enough information. Please give the error-message, create a simple > example-application and place it somewhere on an internet-server. AFAIK > some time-functions use a syscall to interface with the hardware, > sometimes just providing a dummy-syscall is enough to make the linker > "happy". The calls I am making are c library calls and are abstract and do not relate to the hardware. The error messages are 1) undefined reference to `mktime' 2) undefined reference to `gmtime_r' Martin Thomas wrote: > >> 2) If I include the lstdc++ in a pure C project does it create any >> overhead ? > > You can simple try yourself. Create and check the map-file for changes > after make clean all with an without the c++ library-option. When using > makefiles based on the WinARM-template (which is based on the > WinAVR-template) the summary of the memory-usage is part of the output > of make all. I must admit I find the map file very hard to read. I know librarys do not normally increase the size code where no use is made of them, but I have no idea why the demo's do not include all the librarys so when the demo's are extended by users it does not "just work" tm ;). Martin Thomas wrote: >> 3) The lpc_2129_newlib_cpp_20050820.zip demo has the following in the >> make file >> ... >> Where do I find the ibnewlibc-lpc.a in the Winarm package ? > > Suggestion: Find it by searching for the file-name. > Start->Search->Files->search in c:\WinARM, seach for libnewlib-lpc.a > (==>arm-elf/lib/). You might want to read the readme.file for WinARM > 3/06 even if you are using an older version. The location of the library > is mentioned two times in this readme since it has been a FAQ. (I wonder > how many people do not know about the file-search function in Windows). > > Martin Thomas I would be surprised too if a programmer did not know about this, I certainly do and I did search for this library, and it was not there. I even did it from a command propmt. Here is my output :- C:\WinARM>dir *.a /s Volume in drive C has no label. Volume Serial Number is 8016-5CBD Directory of C:\WinARM\arm-elf\lib 14/01/2006 02:03 538,554 libc.a 14/01/2006 02:03 538,554 libg.a 14/01/2006 04:32 557,648 libiberty.a 14/01/2006 02:03 343,992 libm.a 14/01/2006 02:04 22,218 libnosys.a 14/01/2006 02:04 28,102 librdimon.a 14/01/2006 02:04 24,644 librdpmon.a 14/01/2006 04:25 4,666,504 libstdc++.a 14/01/2006 04:25 315,766 libsupc++.a 9 File(s) 7,035,982 bytes Directory of C:\WinARM\arm-elf\lib\be 14/01/2006 02:03 536,734 libc.a 14/01/2006 02:03 536,734 libg.a 14/01/2006 04:32 557,832 libiberty.a 14/01/2006 02:03 344,328 libm.a 14/01/2006 02:04 22,218 libnosys.a 14/01/2006 02:04 28,118 librdimon.a 14/01/2006 02:04 24,652 librdpmon.a 14/01/2006 04:26 4,668,202 libstdc++.a 14/01/2006 04:26 316,216 libsupc++.a 9 File(s) 7,035,034 bytes Directory of C:\WinARM\arm-elf\lib\be\fpu 14/01/2006 02:03 531,696 libc.a 14/01/2006 02:03 531,696 libg.a 14/01/2006 04:32 556,924 libiberty.a 14/01/2006 02:03 264,040 libm.a 14/01/2006 02:04 22,218 libnosys.a 14/01/2006 02:04 28,126 librdimon.a 14/01/2006 02:04 24,660 librdpmon.a 14/01/2006 04:29 4,685,580 libstdc++.a 14/01/2006 04:29 317,342 libsupc++.a 9 File(s) 6,962,282 bytes Directory of C:\WinARM\arm-elf\lib\be\fpu\interwork 14/01/2006 02:04 533,964 libc.a 14/01/2006 02:04 533,964 libg.a 14/01/2006 04:32 559,160 libiberty.a 14/01/2006 02:04 264,504 libm.a 14/01/2006 02:04 22,218 libnosys.a 14/01/2006 02:04 28,166 librdimon.a 14/01/2006 02:04 24,804 librdpmon.a 14/01/2006 04:30 4,699,738 libstdc++.a 14/01/2006 04:30 319,280 libsupc++.a 9 File(s) 6,985,798 bytes Directory of C:\WinARM\arm-elf\lib\be\fpu\nofmult 14/01/2006 02:04 537,720 libc.a 14/01/2006 02:04 537,720 libg.a 14/01/2006 04:32 556,688 libiberty.a 14/01/2006 02:04 264,302 libm.a 14/01/2006 02:04 22,218 libnosys.a 14/01/2006 02:04 28,150 librdimon.a 14/01/2006 02:04 24,696 librdpmon.a 14/01/2006 04:30 4,708,422 libstdc++.a 14/01/2006 04:30 318,632 libsupc++.a 9 File(s) 6,998,548 bytes Directory of C:\WinARM\arm-elf\lib\be\interwork 14/01/2006 02:04 539,022 libc.a 14/01/2006 02:04 539,022 libg.a 14/01/2006 04:32 560,104 libiberty.a 14/01/2006 02:04 344,836 libm.a 14/01/2006 02:04 22,218 libnosys.a 14/01/2006 02:04 28,150 librdimon.a 14/01/2006 02:04 24,788 librdpmon.a 14/01/2006 04:29 4,682,368 libstdc++.a 14/01/2006 04:29 318,134 libsupc++.a 9 File(s) 7,058,642 bytes Directory of C:\WinARM\arm-elf\lib\be\nofmult 14/01/2006 02:04 542,970 libc.a 14/01/2006 02:04 542,970 libg.a 14/01/2006 04:32 557,496 libiberty.a 14/01/2006 02:04 344,456 libm.a 14/01/2006 02:04 22,218 libnosys.a 14/01/2006 02:04 28,142 librdimon.a 14/01/2006 02:04 24,688 librdpmon.a 14/01/2006 04:29 4,689,076 libstdc++.a 14/01/2006 04:29 317,410 libsupc++.a 9 File(s) 7,069,426 bytes Directory of C:\WinARM\arm-elf\lib\fpu 14/01/2006 02:03 533,604 libc.a 14/01/2006 02:03 533,604 libg.a 14/01/2006 04:32 556,872 libiberty.a 14/01/2006 02:03 264,020 libm.a 14/01/2006 02:04 22,218 libnosys.a 14/01/2006 02:04 28,118 librdimon.a 14/01/2006 02:04 24,660 librdpmon.a 14/01/2006 04:27 4,683,890 libstdc++.a 14/01/2006 04:27 316,904 libsupc++.a 9 File(s) 6,963,890 bytes Directory of C:\WinARM\arm-elf\lib\fpu\interwork 14/01/2006 02:03 535,872 libc.a 14/01/2006 02:03 535,872 libg.a 14/01/2006 04:32 559,052 libiberty.a 14/01/2006 02:03 264,484 libm.a 14/01/2006 02:04 22,218 libnosys.a 14/01/2006 02:04 28,150 librdimon.a 14/01/2006 02:04 24,788 librdpmon.a 14/01/2006 04:28 4,698,052 libstdc++.a 14/01/2006 04:28 318,834 libsupc++.a 9 File(s) 6,987,322 bytes Directory of C:\WinARM\arm-elf\lib\fpu\nofmult 14/01/2006 02:03 539,860 libc.a 14/01/2006 02:03 539,860 libg.a 14/01/2006 04:32 556,568 libiberty.a 14/01/2006 02:03 264,282 libm.a 14/01/2006 02:04 22,218 libnosys.a 14/01/2006 02:04 28,142 librdimon.a 14/01/2006 02:04 24,696 librdpmon.a 14/01/2006 04:28 4,706,280 libstdc++.a 14/01/2006 04:28 318,182 libsupc++.a 9 File(s) 7,000,088 bytes Directory of C:\WinARM\arm-elf\lib\interwork 14/01/2006 02:03 540,842 libc.a 14/01/2006 02:03 540,842 libg.a 14/01/2006 04:32 559,928 libiberty.a 14/01/2006 02:03 344,500 libm.a 14/01/2006 02:04 22,218 libnosys.a 14/01/2006 02:04 28,142 librdimon.a 14/01/2006 02:04 24,780 librdpmon.a 14/01/2006 04:27 4,680,694 libstdc++.a 14/01/2006 04:27 317,692 libsupc++.a 9 File(s) 7,059,638 bytes Directory of C:\WinARM\arm-elf\lib\nofmult 14/01/2006 02:03 545,014 libc.a 14/01/2006 02:03 545,014 libg.a 14/01/2006 04:32 557,344 libiberty.a 14/01/2006 02:03 344,116 libm.a 14/01/2006 02:04 22,218 libnosys.a 14/01/2006 02:04 28,126 librdimon.a 14/01/2006 02:04 24,680 librdpmon.a 14/01/2006 04:27 4,686,974 libstdc++.a 14/01/2006 04:27 316,976 libsupc++.a 9 File(s) 7,070,462 bytes Directory of C:\WinARM\arm-elf\lib\thumb 14/01/2006 02:03 503,356 libc.a 14/01/2006 02:03 503,356 libg.a 14/01/2006 04:32 553,960 libiberty.a 14/01/2006 02:03 309,536 libm.a 14/01/2006 02:04 22,084 libnosys.a 14/01/2006 02:04 28,126 librdimon.a 14/01/2006 02:04 24,716 librdpmon.a 14/01/2006 04:26 4,951,170 libstdc++.a 14/01/2006 04:26 317,476 libsupc++.a 9 File(s) 7,213,780 bytes Directory of C:\WinARM\arm-elf\lib\thumb\be 14/01/2006 02:04 502,404 libc.a 14/01/2006 02:04 502,404 libg.a 14/01/2006 04:32 554,536 libiberty.a 14/01/2006 02:04 309,756 libm.a 14/01/2006 02:04 22,084 libnosys.a 14/01/2006 02:04 28,142 librdimon.a 14/01/2006 02:04 24,732 librdpmon.a 14/01/2006 04:31 4,950,480 libstdc++.a 14/01/2006 04:30 317,894 libsupc++.a 9 File(s) 7,212,432 bytes Directory of C:\WinARM\arm-elf\lib\thumb\be\interwork 14/01/2006 02:04 504,220 libc.a 14/01/2006 02:04 504,220 libg.a 14/01/2006 04:32 556,388 libiberty.a 14/01/2006 02:04 310,544 libm.a 14/01/2006 02:04 22,084 libnosys.a 14/01/2006 02:04 28,166 librdimon.a 14/01/2006 02:04 24,844 librdpmon.a 14/01/2006 04:31 4,958,662 libstdc++.a 14/01/2006 04:31 319,304 libsupc++.a 9 File(s) 7,228,432 bytes Directory of C:\WinARM\arm-elf\lib\thumb\interwork 14/01/2006 02:04 505,168 libc.a 14/01/2006 02:04 505,168 libg.a 14/01/2006 04:32 555,844 libiberty.a 14/01/2006 02:04 310,324 libm.a 14/01/2006 02:04 22,084 libnosys.a 14/01/2006 02:04 28,150 librdimon.a 14/01/2006 02:04 24,832 librdpmon.a 14/01/2006 04:31 4,959,372 libstdc++.a 14/01/2006 04:31 318,902 libsupc++.a 9 File(s) 7,229,844 bytes Directory of C:\WinARM\lib 14/01/2006 04:25 1,008,642 libiberty.a 1 File(s) 1,008,642 bytes Directory of C:\WinARM\lib\gcc\arm-elf\4.0.2 14/01/2006 04:24 318,650 libgcc.a 14/01/2006 04:24 19,436 libgcov.a 14/01/2006 04:45 30,640 libnewlib-lpc.a 3 File(s) 368,726 bytes Directory of C:\WinARM\lib\gcc\arm-elf\4.0.2\be 14/01/2006 04:24 317,986 libgcc.a 14/01/2006 04:24 19,436 libgcov.a 2 File(s) 337,422 bytes Directory of C:\WinARM\lib\gcc\arm-elf\4.0.2\be\fpu 14/01/2006 04:24 310,574 libgcc.a 14/01/2006 04:24 19,436 libgcov.a 2 File(s) 330,010 bytes Directory of C:\WinARM\lib\gcc\arm-elf\4.0.2\be\fpu\interwork 14/01/2006 04:24 310,894 libgcc.a 14/01/2006 04:24 19,436 libgcov.a 2 File(s) 330,330 bytes Directory of C:\WinARM\lib\gcc\arm-elf\4.0.2\be\fpu\interwork\under 12/01/2006 20:30 318,922 libgcc.a 12/01/2006 20:30 19,404 libgcov.a 2 File(s) 338,326 bytes Directory of C:\WinARM\lib\gcc\arm-elf\4.0.2\be\fpu\nofmult 14/01/2006 04:24 302,820 libgcc.a 14/01/2006 04:24 19,436 libgcov.a 2 File(s) 322,256 bytes Directory of C:\WinARM\lib\gcc\arm-elf\4.0.2\be\interwork 14/01/2006 04:24 318,350 libgcc.a 14/01/2006 04:24 19,436 libgcov.a 2 File(s) 337,786 bytes Directory of C:\WinARM\lib\gcc\arm-elf\4.0.2\be\nofmult 14/01/2006 04:24 310,240 libgcc.a 14/01/2006 04:24 19,436 libgcov.a 2 File(s) 329,676 bytes Directory of C:\WinARM\lib\gcc\arm-elf\4.0.2\fpu 14/01/2006 04:24 311,126 libgcc.a 14/01/2006 04:24 19,436 libgcov.a 2 File(s) 330,562 bytes Directory of C:\WinARM\lib\gcc\arm-elf\4.0.2\fpu\interwork 14/01/2006 04:24 311,434 libgcc.a 14/01/2006 04:24 19,436 libgcov.a 2 File(s) 330,870 bytes Directory of C:\WinARM\lib\gcc\arm-elf\4.0.2\fpu\nofmult 14/01/2006 04:24 303,180 libgcc.a 14/01/2006 04:24 19,436 libgcov.a 2 File(s) 322,616 bytes Directory of C:\WinARM\lib\gcc\arm-elf\4.0.2\interwork 14/01/2006 04:24 319,002 libgcc.a 14/01/2006 04:24 19,436 libgcov.a 2 File(s) 338,438 bytes Directory of C:\WinARM\lib\gcc\arm-elf\4.0.2\nofmult 14/01/2006 04:24 310,708 libgcc.a 14/01/2006 04:24 19,436 libgcov.a 2 File(s) 330,144 bytes Directory of C:\WinARM\lib\gcc\arm-elf\4.0.2\thumb 14/01/2006 04:24 327,446 libgcc.a 14/01/2006 04:24 19,576 libgcov.a 2 File(s) 347,022 bytes Directory of C:\WinARM\lib\gcc\arm-elf\4.0.2\thumb\be 14/01/2006 04:24 327,558 libgcc.a 14/01/2006 04:24 19,576 libgcov.a 2 File(s) 347,134 bytes Directory of C:\WinARM\lib\gcc\arm-elf\4.0.2\thumb\be\interwork 14/01/2006 04:24 323,962 libgcc.a 14/01/2006 04:24 19,576 libgcov.a 2 File(s) 343,538 bytes Directory of C:\WinARM\lib\gcc\arm-elf\4.0.2\thumb\interwork 14/01/2006 04:24 323,858 libgcc.a 14/01/2006 04:24 19,576 libgcov.a 2 File(s) 343,434 bytes Directory of C:\WinARM\utils\insight_gdb_6_4_50\lib 19/11/2005 04:46 267,408 libarm-elf-sim.a 19/11/2005 04:46 203,940 libiberty.a 19/11/2005 04:46 858 libitclstub32.a 19/11/2005 04:46 746 libitkstub32.a 19/11/2005 04:46 491,868 libpsp-sim.a 19/11/2005 04:46 552,724 libtcl84.a 19/11/2005 04:46 1,102 libtclstub84.a 19/11/2005 04:46 490,984 libtk84.a 19/11/2005 04:46 2,266 libtkstub84.a 9 File(s) 2,011,896 bytes Total Files Listed: 189 File(s) 121,860,428 bytes 0 Dir(s) 58,793,361,408 bytes free C:\WinARM> Clifford Slocombe Wrote : > You have commented out the version of LIBS that links libgcc.a - why > would you do that? I did that because it could not find the library. Here is my code :- // Access methods to read and write the LPC Clock in unix time ! // The clock does not run until it is first set #define _REENT_ONLY #include <time.h> #include "lpc2103.h" //struct tm //{ // int tm_sec; // int tm_min; // int tm_hour; // int tm_mday; // int tm_mon; // int tm_year; // int tm_wday; // int tm_yday; // int tm_isdst; //}; void init_clock(void) { RTC_CIIR = 0; // No ints RTC_ALYEAR = 0xFFF; // Disable Alarm feature !!! RTC_AMR = 0; if (RTC_CCR != 0x11) { RTC_CCR = 0x2; // Hold the clock in reset until it gets a good time } } time_t get_time_low(void) { struct tm stim; stim.tm_sec = RTC_SEC; stim.tm_min = RTC_MIN; stim.tm_hour = RTC_HOUR; stim.tm_mday = RTC_DOM; stim.tm_mon = RTC_MONTH; stim.tm_year = RTC_YEAR; stim.tm_wday = RTC_DOW; stim.tm_yday = RTC_DOY; stim.tm_isdst = 0; return mktime(&stim); } time_t get_time(void) { time_t result; do { result = get_time_low(); } while (result != get_time_low()); return result; } void set_time(time_t time_in) { struct tm stim; gmtime_r(&time_in, &stim); RTC_CCR = 0x2; // Reset the clock RTC_SEC = stim.tm_sec; RTC_MIN = stim.tm_min; RTC_HOUR = stim.tm_hour; RTC_DOM = stim.tm_mday; RTC_MONTH = stim.tm_mon; RTC_YEAR = stim.tm_year; RTC_DOW = stim.tm_wday; RTC_DOY = stim.tm_yday; RTC_CCR = 0x11; // Switch on the clock !! } Thanks for your replys so far and thanks again for the WinARM package.
Fordp wrote: > Clifford Slocombe Wrote : >> You have commented out the version of LIBS that links libgcc.a - why >> would you do that? > > I did that because it could not find the library. > Well it is clearly present in the directory dump you provided. You DO have to tell the linker where it is though! This is a case where the 'more information' that Martin requested would help. The log should include the linker invokation as well as the resultant errors - verbatim, not paraphrased or manually transcribed. You can cut & paste from console windows - right-click, Mark, select with the mouse, press enter - the text will be in the paste buffer. For example, I have a macro in my make file that looks like this: CLIBPATHS = -L$(WINARM_TOOLS_ROOT)/lib/gcc/arm-elf/4.0.2/interwork -L$(WINARM_TOOLS_ROOT)/arm-elf/lib/interwork It is used in the linker invokation to specify the paths to the correct libraries: $(LD) $(OBJECTS) ./lib/$(OSLIB) $(CLIBPATHS) $(LFLAGS) -o ./output/$(PROJNAME).out - the Thumb/ARM interwork libraries in this case, but you might use the defaults (one folder up, or one of the other 'special' libraries. Clifford
I have established that the library functions I want are implemented in newlib. I am still struggling to get the linker to find libgcc.a. I am not sure the newlib stuff is in libgcc.a. I will keep trying. I am building for the LPC2103 and I have no thumb code at this time. All the best. FordP
Fordp wrote: > I have established that the library functions I want are implemented in > newlib. Yes thay are, newlib is implemented by libc.a and libm.a > I am still struggling to get the linker to find libgcc.a. > You have not provided the requested information (a full build log)! This will tell us exactly how you are invoking the linker. Fragments of makefiles are not helpful, since it does not tell us the actual link command used - an error in the makefile for example could yield unexpected results. You are much more likely to get a resolution if you do this! For a start it will allow me to tell you exactly what options YOU need to set rather that give you examples of what I am setting, which may only serve to confuse. > I am not sure the newlib stuff is in libgcc.a. It is not; libgcc.a contains support functions for the compiler, it is normally required since the compiler will generate code that makes calls to it. That is why I was surprised to see it commented out. Clifford
here is my build log :- Assembling crt.s Compiling D505.c Compiling interfce.c Compiling win10.c Compiling lpcisr.c Compiling os2.c Compiling i2c.c Compiling ind_gmtm.c Compiling clock.c Linking d911lpc C:/WinARM/bin/arm-elf-ld -LC:/WinARM/lib/gcc/arm-elf/4.0.2/interwork -LC:/WinARM/arm-elf/lib/interwork -nostartfiles --start-group -lc -lm -lstdc++ -lgcc --end-group -Map d911lpc.map -Tlpc2103_flash.cmd -o d911lpc.out crt.o D505.o dali15.o interfce.o win10.o lpcisr.o os2.o i2c.o ind_gmtm.o clock.o clock.o: In function `get_time_low':C:\Documents and Settings\SimonE\Eclipse_Workspace\D911LPC/clock.c:299: undefined reference to `mktime' clock.o: In function `set_time':C:\Documents and Settings\SimonE\Eclipse_Workspace\D911LPC/clock.c:319: undefined reference to `gmtime_r' make: *** [d911lpc.out] Error 1 make: Target `all' not remade because of errors. I modified my makefile to show the linker command line. If I had just sent my normal build log it would have said nothing useful. I think you will agree it shows that libc.a and libm.a are in there so assuming they are the correct librarys then they should contain mktime and gmtime_r. I have already posted my code previously, at least the module with problems. The code I posted should build fine on any chip in the range LPC2101 to LPC2106, I have not looked at others at this time. You should be able to add the module above to any suitable project and get the results as I do. Please note the rest of my code is deeply embedded and so has little use for any librarys. This time/date convertion is the expception in my code. Thank you for your help so far. Clifford Slocombe wrote: > Fordp wrote: >> I have established that the library functions I want are implemented in >> newlib. > Yes thay are, newlib is implemented by libc.a and libm.a > >> I am still struggling to get the linker to find libgcc.a. >> > You have not provided the requested information (a full build log)! This > will tell us exactly how you are invoking the linker. Fragments of > makefiles are not helpful, since it does not tell us the actual link > command used - an error in the makefile for example could yield > unexpected results. You are much more likely to get a resolution if you > do this! For a start it will allow me to tell you exactly what options > YOU need to set rather that give you examples of what I am setting, > which may only serve to confuse. > >> I am not sure the newlib stuff is in libgcc.a. > It is not; libgcc.a contains support functions for the compiler, it is > normally required since the compiler will generate code that makes calls > to it. That is why I was surprised to see it commented out. > > > Clifford
Fordp wrote: > here is my build log :- > Thanks, that is helpful in so far as we no longer just have to take your word for it. ;-) And it is also good to expose the build commands just so you can be sure yourself what you are building and how. I must admit that it all looks correct. The only thing I would be wary of is spaces in paths (like "Documents and Settings"). I have seen problems in the past with some GNU tools for Win32 not processing such paths correctly. But this does not appear to be the problem in this instance. Even so I'd recommend moving the project files elsewhere. I just inspected the interwork\libc.a library with teh arm-elf-nm utility, and it does appear to contain mktime and gmtime_r. - stumped, sorry. Clifford
I got back to my code and I have managed to make it build Hurray. The cause of the problem seems to stem from calling arm-elf-ld directly to perform the link. I changed it over to link by calling arm-elf-gcc and a couple of tweaks later it is building. Thanks Clifford and Martin for you efforts. Cheers. FordP Come on England ;)
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