I'm using ffplay in my Application. I implemented the Librarys which has been used in this Project: http://code.google.com/p/ffmpeg4iphone/downloads/detail?name=ffplay-xproj.zip&can=2&q=
But I've seen that this Sources are very old(Apr 2009). I wanted to Build new Librarys and then change it with these In my project.
What I've done:
Downloaded the ffmpeg Source code: (using command line: svn checkout svn://svn.ffmpeg.org/ffmpeg/trunk ffmpeg)
Compiled the Project with special ./configure options and the gas-processor :
http://lists.mplayerhq.hu/pipermail/ffmpeg-devel/2009-October/076618.html
I only changed here the Paths of the actual locations for the iPhone SDK 4.1
Changed the header Path in xCode Active Target Project Settings to my ffmpeg folder
Included the .a files in my project in xCode
Added the Other Linker Flags -lm -lbz2 -lz
Tried to Build my Application, but I get some Linker errors where symbol(s) wasn't found.
Undefined symbols:
"avcodec_init()", referenced from:
And the other errors are nearly the same (_av_codec.....)
How can I build it correctly?
I've found the solution: I set the architecture to Optimized(arm7) and then all was working.
One more Question: I use ffmpeg for streaming an online stream. Which Values Should I set to get a good streaming quality also when I am in 3G. This what i've done:
set the audio-buffer to 1024
set the lowres value of mpeg to 3
Not sure if you are using C or C++ (g++) compiler, but try guarding your #includes for ffmpeg with extern "C": the c++ compiler (if it is used) is probably mangling the function names and hence the link errors.
Try to enclose your include with extern "C":
#ifdef __cplusplus
extern "C" {
#endif
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
#ifdef __cplusplus
}
#endif
Related
I realize a CMSIS Project solution with VS Code but I've an error on an include file :
#include "stm32f10x.h"
And I've got this error :
In included file: "Compiler generates FPU instructions for a device without an FPU (check __FPU_PRESENT)"clang(pp_hash_error)
core_cm3.h(90, 6): Error occurred here
The path of this file is here :
C:\Users\"name"\AppData\Local\Arm\Packs\Keil\STM32F1xx_DFP\2.4.0\Device\Include
But I think I forgot something during the configuration.
I justa want to build my C file but VS code doesn't make the link between my .h and my CMSIS project.
You are never supposed to #include "stm32f10x.h"
You only #include "stm32f1xx.h" and it will include the other headers you need.
You must also define a macro on the command line, one of STM32F101x6, STM32F101xB, STM32F101xE or STM32F101xG.
For most compilers you can define this with an argument like -DSTM32F101xB.
After that you will need particular command line arguments that match your chosen processor, such as -mthumb -mcpu=cortex-m3 -mfpu=none.
Maybe your error was specifying an incorrect -mfpu=.
I am currently learning STM32F103 with Eclipse. I am facing a problem in linker stage, that I got linker error : undefined reference to `HAL_TIM_Base_Init'
Building target: TimerTest.elf
Invoking: GNU ARM Cross C++ Linker
arm-none-eabi-g++ -mcpu=cortex-m3 -mthumb -Og -fmessage-length=0 -fsigned-char -ffunction-sections -fdata-sections -ffreestanding -fno-move-loop-invariants -Wall -Wextra -g3 -T "C:\Users\Gebruiker\Dropbox\CodeBase\Eclipse\TimerTest\SW4STM32\WS2812_TimerTest\STM32F103C8Tx_FLASH.ld" -Xlinker --gc-sections -L"C:\Users\Gebruiker\Dropbox\CodeBase\Eclipse\TimerTest\Src" -L"C:\Users\Gebruiker\Dropbox\CodeBase\Eclipse\TimerTest\Drivers\STM32F1xx_HAL_Driver\Src" -L"C:\Users\Gebruiker\Dropbox\CodeBase\Eclipse\TimerTest\Drivers\STM32F1xx_HAL_Driver\Inc" -L"C:\Users\Gebruiker\Dropbox\CodeBase\Eclipse\TimerTest\Inc" -Wl,-Map,"TimerTest.map" -Xlinker --cref --specs=nano.specs -o "TimerTest.elf" ./Src/WS2812.o ./Src/main.o ./Src/stm32f1xx_hal_msp.o ./Src/stm32f1xx_hal_tim.o ./Src/stm32f1xx_it.o ./Src/system_stm32f1xx.o ./Src/usb_device.o ./Src/usbd_cdc_if.o ./Src/usbd_conf.o ./Src/usbd_desc.o ./SW4STM32/startup_stm32f103xb.o ./Middlewares/ST/STM32_USB_Device_Library/Core/Src/usbd_core.o ./Middlewares/ST/STM32_USB_Device_Library/Core/Src/usbd_ctlreq.o ./Middlewares/ST/STM32_USB_Device_Library/Core/Src/usbd_ioreq.o ./Middlewares/ST/STM32_USB_Device_Library/Class/CDC/Src/usbd_cdc.o ./Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal.o ./Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_cortex.o ./Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_dma.o ./Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_flash.o ./Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_flash_ex.o ./Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_gpio.o ./Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_gpio_ex.o ./Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_i2c.o ./Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_pcd.o ./Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_pcd_ex.o ./Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_pwr.o ./Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_rcc.o ./Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_rcc_ex.o ./Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_spi.o ./Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_spi_ex.o ./Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_tim.o ./Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_tim_ex.o ./Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_ll_usb.o
./Src/WS2812.o: In function `WS2812Init':
C:\Users\Gebruiker\Dropbox\CodeBase\Eclipse\TimerTest\Debug/../Src/WS2812.c:30: undefined reference to `HAL_TIM_Base_Init'
collect2.exe: error: ld returned 1 exit status
make: *** [makefile:64: TimerTest.elf] Error 1
Here is my code:
main.c
#include "main.h"
#include "WS2812.h"
#include "stm32f1xx_hal.h"
#include "usb_device.h"
int main(void)
{
WS2812Init();
while (1)
{
}
}
WS2812.h:
#ifndef INC_WS2812_H_
#define INC_WS2812_H_
#include <stm32f1xx_hal_gpio.h> // use gpio output
#include <stm32f1xx_hal_rcc.h>
#include <stm32f1xx_hal_tim.h> // use timer
// adopt gpio port & pin for following section
#define WS2812_GPIO_PORT GPIOB
#define WS2812_GPIO_PIN GPIO_PIN_12
#define ENABLE_GPIO_RCC() do{\
if(!__HAL_RCC_GPIOB_IS_CLK_ENABLED())\
__HAL_RCC_GPIOB_CLK_ENABLE();\
}while(0U)
static GPIO_InitTypeDef SW2812Pin = {
.Pin = WS2812_GPIO_PIN,
.Speed = GPIO_SPEED_FREQ_LOW,
.Mode = GPIO_MODE_OUTPUT_PP
};
#define SYS_CLOCK
// adopt timer configuration for following section
#define WS2812_SELECTED_TIMER TIM4
static TIM_HandleTypeDef ws2812TimerConfig;
void WS2812Init(void);
#endif /* INC_WS2812_H_ */
WS2812.c:
#include "WS2812.h"
void WS2812Init(void)
{
// init GPIO as output
ENABLE_GPIO_RCC();
HAL_GPIO_WritePin(WS2812_GPIO_PORT, WS2812_GPIO_PIN, GPIO_PIN_RESET);
HAL_GPIO_Init(WS2812_GPIO_PORT, &SW2812Pin);
// init timer
uint16_t targetFrequency = 1000; // 1kHz
const uint16_t preScaler = 360;
const uint16_t period = SystemCoreClock / (preScaler*targetFrequency);
// clear status register
__HAL_RCC_TIM4_CLK_ENABLE();
ws2812TimerConfig.Instance = WS2812_SELECTED_TIMER;
ws2812TimerConfig.Init.Prescaler = preScaler - 1;
ws2812TimerConfig.Init.Period = period;
ws2812TimerConfig.Init.CounterMode = TIM_COUNTERMODE_UP;
HAL_TIM_Base_Init(&ws2812TimerConfig); // <- linker can not find this function
__HAL_TIM_ENABLE(&ws2812TimerConfig);
}
This is my include structure:
main->
include"WS2812.h" ->
include stm32f1xx_hal_tim.h
The stm32f1xx_hal_tim.h is in the STM32F1xxHAL_DRIVER->inc, which is also put in the include path.
I also have added the include path in the project properties->C/C++ Build->Settings
for
GNU ARM Cross Assembler
GNU ARM Cross C compiler
GNU ARM Cross C++ Compiler
I searched in the internet found out this is a linker issue, that the linker can not find the proper source for linking.
What I have found in internet and tried:
added the folder which contents stm32f1xx_hal_tim.h and WS2812.h to project properties-> C/C++ Build -> GNU ARM Cross C++ Linker -> Libraries -> (-L)
added the folder which contents stm32f1xx_hal_tim.c and WS2812.c to project properties-> C/C++ Build -> GNU ARM Cross C++ Linker -> Libraries -> (-L)
Checked "stm32f1xx_hal_tim.h" -> property-> Exclude resource from build is unchecked (some people in the internet solved the problem by this)
Added "--specs=nano.specs" to the Linker options
All of above do not solve the problem.
Some people suggest to modify the makefile. But the project generate the makefile automatically, so I don't know where to start.
If anyone can provide a hint or solution, it will be very thanksful.
UPDATE 1:
Thanks Jacek Ślimok's input.
I didn't know that, I also need to doe the "exclude from build" for .c files. And I check in the file browser. The .c files are not check in this configuration. Do you mean like this?
excluded from Build
The stm32f1xx_hal_tim.c is under project->Driver->STM32F1xxHAL_Driver->Src
At this moment, the problem remains unsolved.
Another thing I noticed is that, the Eclipse read my stm32f1xx_hal_tim.c differently. When I open the stm32f1xx_hal_tim.c in Eclipse, it just give me a plane text like in normal notepad:
stm32f1xx_hal_tim.c
But other .c file like stm32f1xx_hal_gpio.c looks like normal.
stm32f1xx_hal_gpio.c
They are in the same folder. I don't know where and why this difference came from. Does this relative to my problem.
Update2
#Jacek Ślimok, I found out why the eclipse see the stm32f1xx_hal_tim.c as plane text. I accidentally turned on the Scalability setting in Preference-> Editor, stm32f1xx_hal_tim.c has relatively large file size, 161kB. After I change it back to default, Eclipse shows the file as normal. But the linker problem is still there...
In the main.c I also used HAL_GPIO_TogglePin() from stm32f1xx_hal_gpio.h/.c. The linker does not complain about that. Currently I can not tell the difference between these 2 files(stm32f1xx_hal_gpio and stm32f1xx_hal_tim) They are in the same folder, and included the same as well. But I can use the function for GPIO not for Timer.
But one thing can be sure:
I can use the macro in the stm32f1xx_hal_tim.h, so this is a linker problem.
I start this project base on another project, which was generated from STM32CubeMX. To practice the timer function I added the timer config to it, this is the point I got problem with the linker.
I hope these information can lead to more hints.
Update 3
I tried build the .c files separately
For stm32f1xx_hal.h.c:
00:09:16 **** Building Selected Files of configuration Release for project TimerTest ****
Info: Internal Builder is used for build
arm-none-eabi-gcc -mcpu=cortex-m3 -mthumb -Os -fmessage-length=0 -fsigned-char -ffunction-sections -fdata-sections -ffreestanding -Wall -Wextra -g -DSTM32F103xB -DHSE_VALUE=8000000 "-IC:\\Users\\Gebruiker\\Dropbox\\CodeBase\\Eclipse\\TimerTest\\Drivers\\CMSIS\\Include" "-IC:\\Users\\Gebruiker\\Dropbox\\CodeBase\\Eclipse\\TimerTest\\Drivers\\CMSIS\\Device\\ST\\STM32F1xx\\Include" "-IC:\\Users\\Gebruiker\\Dropbox\\CodeBase\\Eclipse\\TimerTest\\Drivers\\STM32F1xx_HAL_Driver\\Inc" "-IC:\\Users\\Gebruiker\\Dropbox\\CodeBase\\Eclipse\\TimerTest\\Inc" "-IC:\\Users\\Gebruiker\\Dropbox\\CodeBase\\Eclipse\\TimerTest\\Middlewares\\ST\\STM32_USB_Device_Library\\Class\\CDC\\Inc" "-IC:\\Users\\Gebruiker\\Dropbox\\CodeBase\\Eclipse\\TimerTest\\Middlewares\\ST\\STM32_USB_Device_Library\\Core\\Inc" -std=gnu11 -c -o "Drivers\\STM32F1xx_HAL_Driver\\Src\\stm32f1xx_hal_tim.o" "..\\Drivers\\STM32F1xx_HAL_Driver\\Src\\stm32f1xx_hal_tim.c"
00:09:17 Build Finished (took 285ms)
For WS2812.c:
00:11:23 **** Building Selected Files of configuration Release for project TimerTest ****
Info: Internal Builder is used for build
arm-none-eabi-gcc -mcpu=cortex-m3 -mthumb -Os -fmessage-length=0 -fsigned-char -ffunction-sections -fdata-sections -ffreestanding -Wall -Wextra -g -DSTM32F103xB -DHSE_VALUE=8000000 "-IC:\\Users\\Gebruiker\\Dropbox\\CodeBase\\Eclipse\\TimerTest\\Drivers\\CMSIS\\Include" "-IC:\\Users\\Gebruiker\\Dropbox\\CodeBase\\Eclipse\\TimerTest\\Drivers\\CMSIS\\Device\\ST\\STM32F1xx\\Include" "-IC:\\Users\\Gebruiker\\Dropbox\\CodeBase\\Eclipse\\TimerTest\\Drivers\\STM32F1xx_HAL_Driver\\Inc" "-IC:\\Users\\Gebruiker\\Dropbox\\CodeBase\\Eclipse\\TimerTest\\Inc" "-IC:\\Users\\Gebruiker\\Dropbox\\CodeBase\\Eclipse\\TimerTest\\Middlewares\\ST\\STM32_USB_Device_Library\\Class\\CDC\\Inc" "-IC:\\Users\\Gebruiker\\Dropbox\\CodeBase\\Eclipse\\TimerTest\\Middlewares\\ST\\STM32_USB_Device_Library\\Core\\Inc" -std=gnu11 -c -o "Src\\WS2812.o" "..\\Src\\WS2812.c"
00:11:23 Build Finished (took 275ms)
And for Main.c:
00:12:02 **** Building Selected Files of configuration Release for project TimerTest ****
Info: Internal Builder is used for build
arm-none-eabi-gcc -mcpu=cortex-m3 -mthumb -Os -fmessage-length=0 -fsigned-char -ffunction-sections -fdata-sections -ffreestanding -Wall -Wextra -g -DSTM32F103xB -DHSE_VALUE=8000000 "-IC:\\Users\\Gebruiker\\Dropbox\\CodeBase\\Eclipse\\TimerTest\\Drivers\\CMSIS\\Include" "-IC:\\Users\\Gebruiker\\Dropbox\\CodeBase\\Eclipse\\TimerTest\\Drivers\\CMSIS\\Device\\ST\\STM32F1xx\\Include" "-IC:\\Users\\Gebruiker\\Dropbox\\CodeBase\\Eclipse\\TimerTest\\Drivers\\STM32F1xx_HAL_Driver\\Inc" "-IC:\\Users\\Gebruiker\\Dropbox\\CodeBase\\Eclipse\\TimerTest\\Inc" "-IC:\\Users\\Gebruiker\\Dropbox\\CodeBase\\Eclipse\\TimerTest\\Middlewares\\ST\\STM32_USB_Device_Library\\Class\\CDC\\Inc" "-IC:\\Users\\Gebruiker\\Dropbox\\CodeBase\\Eclipse\\TimerTest\\Middlewares\\ST\\STM32_USB_Device_Library\\Core\\Inc" -std=gnu11 -c -o "Src\\main.o" "..\\Src\\main.c"
..\Src\main.c: In function '_Error_Handler':
..\Src\main.c:268:27: warning: unused parameter 'file' [-Wunused-parameter]
void _Error_Handler(char *file, int line)
^~~~
..\Src\main.c:268:37: warning: unused parameter 'line' [-Wunused-parameter]
void _Error_Handler(char *file, int line)
^~~~
In file included from ..\Src\main.c:55:0:
At top level:
C:\Users\Gebruiker\Dropbox\CodeBase\Eclipse\TimerTest\Inc/WS2812.h:36:26: warning: 'ws2812TimerConfig' defined but not used [-Wunused-variable]
static TIM_HandleTypeDef ws2812TimerConfig;
^~~~~~~~~~~~~~~~~
C:\Users\Gebruiker\Dropbox\CodeBase\Eclipse\TimerTest\Inc/WS2812.h:26:25: warning: 'SW2812Pin' defined but not used [-Wunused-variable]
static GPIO_InitTypeDef SW2812Pin = {
^~~~~~~~~
00:12:02 Build Finished (took 272ms)
There are few warning in the main.c, but they are not crucial.
Update4:
Thanks for Jacek Ślimok's input:
I found out that functions of stm32f1xx_hal_tim.c shows gray in file browser.
functions seems like not usable
But the functions in stm32f1xx_hal_gpio.c shows solid balck.
function in gpio.c are usable
Now the difference is there, just need to find out why.
Thanks in advance.
Best regards.
Doing #include stm32f1xx_hal_tim.h is not enough - it only causes your compiler not to complain, linker will still have a problem. Neither is adding a search path for the linker - this one you use mainly when you have static pre-compiled libraries that you explicitly link with the -l option. HAL is not a static library but rather a library you compile yourself.
To solve your problem, make sure you compile the corresponding source files - in this case stm32f1xx_hal_tim.c file and that it's later being linked. You mention that you use Eclipse and by default it generates a Makefile that causes all source files that you compiled in your project to also be linked. Therefore you mainly should check whether stm32f1xx_hal_tim.c is being compiled. One way to do that is to find the file in the Project Explorer, rightclick on it and select Resource Configurations -> Exclude from Build.... Make sure it's NOT checked. If it is, it is likely a whole directory is excluded from build which it should not be.
Another possibility is given function not being defined in any source file that is compiled or the function signature (name, return type and parameter types) don't match.
Yet another possibility (which in this case turned out to be the source of the issue) is that a portion of the file may not be compiled due to a #if/#ifdef preprocessor directive. In the OP's case this was caused by HAL_TIM_MODULE_ENABLED being undefined.
It is not relative to linker issue, but pre-processor.
As I mentioned, that I am building this code based on a project, which was generated from cubeMX. In the previous project, there is no timer used or configured. Than I started to write timer configuration. What I forgot is that to uncomment the #define HAL_TIM_MODULE_ENABLED in stm32f1xx_hal_conf.h. Which blocked all the implementation in stm32f1xx_hal_tim.c by pre-processor.
That is why eclipse shows all the function in stm32f1xx_hal_tim.c as gray color and not be able to be referenced.
And anyway, thanks Jacek Ślimok's effort!
Agree with Jacek Slimok, had this problem a while back, and for some reason I keep forgetting how to fix it. Googling the same solution every time if becoming annoying.
Just Skip to Solution
So you hit ctrl+space and autocomplete locates the function you want to call.
Yet in build, errors show up as "undefined reference to YOUR_FUNCTION_NAME".
So, you compile dependencies to become object files, but link object files to form an executable "firmware" generated by the compiler.
The "undefined reference" function called in main supposed to come from an object file which the linker can't locate.
Eclipse has a feature that allows you to exclude certain files from being "built" into object files. Thus the linker can't locate that dependency.
Solution:
This works for added folders or individual files in Eclipse.
So you have .c and .h files you created and you sometimes lump them in a folder you added to eclipse.
Right-click that added folder and hit properties.
In left menu select "Settings" under "C/C++ Build".
On the right, uncheck "Exclude resource from build".
Link to the picture below.
Folder Properties window in Eclipse:
Hope that helps everyone, and myself when I forget in a few days. Can you imagine the shock when I see my name on this post?
I wish to run a C Code in android for which I am using android ndk. I also need to add some libraries. While building these libraries, I am getting errors because of the extern statements in the header files. Eclipse IDE shows syntax errors. I also unchecked everything at Project-->Properties--> C/C++ Code Analysis.
Similar example is shown here. How to resolve this?
#ifdef __cplusplus
extern "C" {
#endif
I'm using JNI in Android development. I want to know where do the compiler find the referenced .h files?
Here in jni/jni_part.cpp, it includs lots of .h files. Opencv related files are defined by the SDK, but the "cartoon.h" is sure to be a project-specified header. But I cannot find it in the project folder. Then do the eclipse compile the JNI c++ code at every run? If so , in which directories does the eclipse find these headers?
Maybe it's basic for JNI but I'm not familiar with it. So plz help me out with one or two sentences. Or you could just paste a simple tutorial for JNI in Android, eclipse.
#include <jni.h>
#include <opencv2/core/core.hpp>
#include <opencv2/imgproc/imgproc.hpp>
#include <opencv2/features2d/features2d.hpp>
#include "cartoon.h"
#include "ImageUtils.h" // Handy functions for debugging OpenCV images, by Shervin Emami.
using namespace std;
using namespace cv;
extern "C" {
.....
This is my eclipse project folder structure
/project
/jni
jni_part.cpp
/src
something.java
You'll need to start using android-ndk to compile the .c, .cpp files to a .so library object, which you can then use in your android project.
Please refer to the Android NDK to get started.
http://developer.android.com/tools/sdk/ndk/index.html#GetStarted
you can find examples in the NDK download.
If Eclipse "knows" where cartoon.h file is on disk, it will help you find it - put the cursor on that #include line and press F3.
Regarding your other question: Eclipse compiles only if the relevant files (sources, headers, or mk) change.
I have compiled tesseract for using it in xcode following: http://iphone.olipion.com/cross-compilation/tesseract-ocr
I obtain the .a file, import it as framework in the iphone project, and update the header search path for tesseract header files.
So now I need a simple example in order to get start.
I can't find anything in http :// code.google.com/p/tesseract-ocr/ or by googling.
Anyone can help me give me a starting point (a code snippet)..?!
Many ThankS!
--
Later i found this code:
#include "baseapi.h"
TessBaseAPI::InitWithLanguage(NULL, NULL, language, NULL, false, 0, NULL);
char* text = TessBaseAPI::TesseractRect(imagedata, bytes_per_pixel,
bytes_per_line, 0, 0,
width, height);
TessBaseAPI::End();
but when I try to compile for device (only inserting include statement without the code above) i get the following:
error:syntax error before 'PAGE_RES'
warning:type defaults to 'int' in declaration of 'PAGE_RES'
warning:data definition has no type or storage class
and so on with BLOCK_LIST, IMAGE etc.
if compile for simulator i get
error: expected '=',',',','asm' or 'attribute' before 'PAGE_RES'
and so on with BLOCK_LIST, IMAGE and TessBaseAPI
--- Other Update:
I found solution for include problem:
Where the include occurs must be rename the file.m in .mm extension because we have to tell xcode that we have to use objective-c and c++ together.
http://github.com/nolanbrown/Tesseract-iPhone-Demo
OCRDemo is a demo application that utilizes the Tesseract library (http://code.google.com/p/tesseract-ocr/) as a static library compiled under Mac OS 10.6 using the shell script found at http://robertcarlsen.net/2009/07/15/cross-compiling-for-iphone-dev-884.
The program is only meant to provide a demonstration of the OCR library and it’s abilities on the iPhone, the program is not optimized in any way...
you'll need to update SDKROOT, CPPFLAGS and CXX
variables. For example, here's the relevant part of my build script,
modified to work with 4.0:
export SDKROOT=$DEVROOT/SDKs/iPhoneOS4.0.sdk
export PATH=$DEVROOT/usr/bin:$PATH
# Set up relevant environment variables
export CPPFLAGS="-I$SDKROOT/usr/lib/gcc/arm-apple-darwin10/4.0.1/
include/ -I$SDKROOT/usr/include/ -miphoneos-version-min=4.0"
export CFLAGS="$CPPFLAGS -arch armv6 -pipe -no-cpp-precomp -isysroot
$SDKROOT"
export CPP="$DEVROOT/usr/bin/cpp $CPPFLAGS"
export CXXFLAGS="$CFLAGS"
Dynamic library location generated by the Unix package
LIBPATH=$LIBFILE.dylib
LIBNAME=`basename $LIBPATH`
export LDFLAGS="-L$SDKROOT/usr/lib/ -Wl,-
dylib_install_name,#executable_path/$LIBNAME"
Static library that will be generated for ARM
LIBPATH_static=$LIBFILE.a
LIBNAME_static=`basename $LIBPATH_static`
# TODO: add custom flags as necessary for package
./configure CXX=$DEVROOT/usr/bin/arm-apple-darwin10-g++-4.0.1 CC=
$DEVROOT/usr/bin/arm-apple-darwin10-gcc-4.0.1 LD=$DEVROOT/usr/bin/ld --host=arm-apple-darwin