1 DevCpp-Mingw Install & Compilation Sept 2005 2 ================================== 3 4 Reference Emails available at curl (a] haxx.se: 5 6 Libcurl Install and Use Issues 7 Awaiting an Answer for Win 32 Install 8 res = curl_easy_perform(curl); Error 9 Makefile Issues 10 11 12 Having previously done a thorough review of what was available that met my 13 requirements under GPL, I settled for Libcurl as the software of choice for 14 many reasons not the least of which was the support. 15 16 Background 17 ---------- 18 19 This quest started when I innocently tried to incorporate the libcurl library 20 into my simple source code. I figured that a few easy steps would accomplish 21 this without major headaches. I had no idea that I would be facing an almost 22 insurmountable challenge. 23 24 The main problem lies in two areas. First the bulk of support for libcurl 25 exists for a Unix/linux command line environments. This is of little help when 26 it comes to Windows O/S. 27 28 Secondly the help that does exist for the Windows O/S focused around mingw 29 through a command line argument environment. 30 31 You may ask "Why is this a problem?" 32 33 I'm using a Windows O/S with DevCpp. For those of you who are unfamiliar with 34 DevCpp, it is a window shell GUI that replaces the command line environment 35 for gcc. A definite improvement that I am unwilling to give up. However using 36 DevCpp presented its own set of issues. Inadvertently I also made some 37 careless errors such as compiling the 7.14 version of Makefile with an older 38 version of source code. Thanks to Dan Fandrich for picking this up. 39 40 I did eventually with the help of Daniel, Phillipe and others manage to 41 implement successfully (the only mingw available version) 42 curl-7.13.0-win32-ssl-devel-mingw32 into the DevCpp environment. Only the 43 dynamic libcurl.dll libcurldll.a libraries worked. The static library which I 44 was interested in did not. Furthermore when I tried to implement one of the 45 examples included with the curl package (get info.c) it caused the executable 46 to crash. Tracing the bug I found it in the code and function res = 47 curl_easy_perform(curl);. 48 49 At this point I had to make a choice as to whether invest my limited 50 time-energy resource to fixing the bug or to compile the new version 51 available. After searching the archives I found a very similar or the same bug 52 reported from version 7.12x on. Daniel did inform me that he thought that this 53 bug had been fixed with the latest version. So I proceeded to compile the 54 latest SSL version where I faced other challenges. 55 56 In order to make this process unremarkable for others using the same 57 environment I decided to document the process so that others will find it 58 routine. It would be a shame if newbies could not implement this excellent 59 package for their use. 60 61 I would like to thank the many others in this forum and in the DevCpp forum 62 for their help. Without your help I may either have given up or it would have 63 taken me many times longer to achieve success. 64 65 The Cookbook Approach 66 --------------------- 67 68 This discussion will be confined to a SSL static library compilation and 69 installation. Limited mention and comments will be inserted where appropriate 70 to help with non-SSL, dynamic libraries and executables. 71 72 73 Using Makefile from DevCpp to compile Libcurl libraries 74 75 Preamble 76 -------- 77 78 Using the latest version release - curl-7.14.0.tar.gz. Curl source code is 79 platform independent. This simply means that the source code can be compiled 80 for any Operating System (Linux/Unix Windows etc. and variations of thereof). 81 82 The first thing to note is that inside curl-7.14.0 you will find two folders 83 lib and src. Both contain Makefile.m32 (required for win mingw library or exe 84 compilation) files which are different. The main difference between these two 85 folders and the makefiles is that the src folder contents are used to compile 86 an executable file(curl.exe) while the lib folder contents are used to compile 87 a static (libcurl.a) and dynamic (libcurl.dll & libcurldll.a) file that can be 88 used to compile libcurl with your own source code so that one can use and 89 access all libcurl functions. 90 91 Before we start please make sure that DevCpp is installed properly. In 92 particular make sure you have no spaces in the name of any of the directories 93 and subdirectories where DevCpp is installed. Failure to comply with the 94 install instructions may produce erratic behaviour in DevCpp. For further info 95 check the following sites 96 97 http://aditsu.freeunixhost.com/dev-cpp-faq.html 98 https://sourceforge.net/p/dev-cpp/discussion/48211/thread/2a85ea46 99 100 As I have mentioned before I will confine this to the SSL Library compilations 101 but the process is very similar for compilation of the executable - curl.exe; 102 just substitute the src folder makefile in its stead. 103 104 First use a text processor Notepad, or your own favourite text processor. To 105 engage your favourite text processor, select Makefile.m32 click once with your 106 mouse on file icon; icon turns blue, press the shift key and right-click on 107 mouse, menu appears select "Open with", select your favourite text processor. 108 109 Next read the contents of Makefile.m32. It includes instructions on its use. 110 111 Method I - DOS Command Line 112 --------------------------- 113 114 Note - The only reason I have included this method is that Method II which is 115 the preferred method for compiling does not allow for the setting of option 116 switches (e.g. SSL = 1 or SSL =0). At least that's what they tell me at the 117 Dev-Cpp forum. 118 119 1 - Make a copy of (D:\Dev-Cpp\bin) bin folder and name it "bin Original" 120 place it in the Dev-Cpp installed directory (D:\Dev-Cpp\ for this example) 121 122 2 - Copy the entire contents of the LIB folder of curl-7.14.0.tar.gz or zip 123 version into the bin folder above (D:\Dev-Cpp\bin). The reason being is that 124 the make.exe file resides in this folder. Make.exe will use - Makefile.m32, 125 Makefile.inc, and the source code included in the lib folder to compile the 126 source code. There is a PATH issue with make.exe that remains unresolved at 127 least for me. Unless the entire source code to be compiled is placed entirely 128 within the directory of make.exe an error message will be generated - "file 129 xxxx.yyy not available". 130 131 3- Go to Dev-Cpp\bin and double click on make .exe. You will see a DOS window 132 quickly pop up and close very quickly. Not to worry! Please do not skip this 133 step. 134 135 4- Click on the start button\Programs\MS-DOS Prompt.Once the DOS Window is up 136 Type the disk drive letter (e.g. E: ) engage the enter button. The path should 137 automatically take you to the directory of the make.exe file. 138 139 5- To compile the source code simply type at the DOS prompt make -f 140 Makefile.m32 as per instructions contained in the Makefile.m32 file (use any 141 text processor to read instructions). I don't believe that this makefile 142 allows for the option of non SSL. Ignore any warnings. 143 144 6- Collect and make copies of libcurl.a, libcurl.dll, libcurldll.a and any *.o 145 compilations you might need in another directory outside of the bin directory 146 as you will need this files shortly to set up libcurl for use with 147 Dev-cpp. For most apps *.o is not required. Later on we will show what to do 148 with these files. 149 150 7- You are finished but before closing we need to do cleanup - erase the bin 151 folder and rename the "bin Original" folder created in step 1 to bin. 152 153 Note to compile a curl executable the process is probably similar but instead 154 of using the LIB folder contents use the SRC folder contents and Makefiles in 155 curl-7.14.0.tar.gz. File directories relative placements must be respected for 156 compiling to take place successfully. This may not be possible with the PATH 157 problem that make.exe experiences. If anyone has solved this PATH issue and 158 please make sure it actually works on Win 9x/2000/XP before letting me 159 know. Then please let me or Daniel in on the solution so that it can be 160 included with these instructions. Thanks. 161 162 or 163 164 Method II - Dev-Cpp GUI 165 ----------------------- 166 167 1- Copy the entire contents of the LIB folder of curl-7.14.0.tar.gz or zip 168 version into any folder outside of (Dev-Cpp\bin). 169 170 2- Drop the File/New/click on Project. 171 172 3- New Project Dialogue box appears. Double click on the Static Library. 173 174 4- Create Project Dialogue box appears. Select the LIB folder location to 175 place and locate your Project File Name. Placing the Project File Name 176 elsewhere may cause problems (PATH issue problem again). 177 178 5- Drop down the Project/Project Options. Project Options Dialogue box 179 appears. 180 181 6- Select the Makefile tab in the Project Options Dialogue Box. Check Box - 182 Use Custom Makefile. Click on the Folder icon at the extreme right of the 183 Check Box. Select Makefile.m32 in the folder wherever you have placed the 184 contents of the LIB Folder. Press OK and close the Dialogue Box. 185 186 7- Drop the Menu Project/Click on Add to Project. Open File Dialogue Box 187 appears. The Dialogue Box should open in the folder wherever you have placed 188 the contents of the LIB Folder. If not go there. 189 190 8- Select Crtl-A to select all files in the LIB folder. Click on open to add 191 files and close box. Wait till all files are added. This may take 30 seconds 192 or longer. 193 194 9- Drop the Menu Execute/Click on Compile. 195 196 10- That's it. 197 198 199 The following steps must be completed if Curl is to work properly 200 ================================================================= 201 202 LIB folder inclusions (*.a placement) 203 ------------------------------------- 204 205 1- Refer to Method I - DOS Command Line point # 6 Take libcurl.a, libcurldll.a 206 and install it in the directory C( or whichever drive Dev is installed) 207 :\Dev-Cpp\lib. 208 209 210 Include Folder 211 -------------- 212 213 1- Create a new folder by the name of curl (do not change the name curl to 214 some other name as it will cause major issues) in the directory 215 C:\Dev-Cpp\include. 216 217 2- Copy the entire contents of the curl folder of curl-7.14.0.tar.gz or zip 218 version into the newly created curl directory - C:\Dev-Cpp\include\curl. 219 220 Links To Include And Lib Folder 221 ------------------------------- 222 223 1- Drop the Menu - Tools\Compiler Options\Directories\Libraries. Make sure 224 that C( or whichever drive Dev is installed):\DEV-CPP\lib is included. 225 226 2- Next select the Menu - Tools\Compiler Options\Directories\C Includes. Make 227 sure that C:\DEV-CPP\include and C:\Dev-Cpp\include\curl are included. 228 229 3- Next select the Menu - Tools\Compiler Options\Directories\C++ 230 Includes. Make sure that C:\DEV-CPP\include and C:\Dev-Cpp\include\curl are 231 included. 232 233 Linker Links 234 ------------ 235 236 1- Drop the Menu - Tools\Compiler Options\Directories\Compiler. 237 238 2- Make sure that the box "Add these commands to the linker command line" is 239 checked. 240 241 3- Include in the white space immediately below the box referred in 2 -lcurl 242 -lws2_32. 243 244 SSL Files 245 --------- 246 247 1- Get the latest openSSL (as of time of this writing) 248 openssl-0.9.7e-win32-bin.zip for the minimalist package of the openssl-0.9.7e 249 binaries ported to MS Windows 95/98/NT/XP using the MingW32/GCC-3.1 250 development environment. The file may be downloaded at 251 http://curl.haxx.se/download/. 252 253 2- Open the above zip file. You will find two files - SDL.dll, 254 SDL_mixer.dll. Install them in the directory C:\WINDOWS\SYSTEM32 for Win 9x 255 users and c:\winnt\system32 for NT-family users. 256 257 Multithreading Files 258 -------------------- 259 260 To be completed 261 262 #define 263 ------- 264 265 1- Make sure that your program includes the following - #define CURL_STATICLIB 266 must be declared FIRST before any other define functions may be 267 added. Otherwise you may experience link errors. 268 269 2- Don't forget to include #include "curl/curl.h". 270 271 e.g. 272 #define CURL_STATICLIB 273 #include <windows.h> 274 #include "curl/curl.h" 275 #include <fstream> 276 #include <iostream> 277 #include <vector> 278 etc... 279 280 281 Static or Dynamic Library 282 ------------------------- 283 284 The above steps apply for the use by a static library. Should you choose to 285 use a dynamic library you will be required to perform these additional steps. 286 287 1- Refer to Method I - DOS Command Line point # 6. Install libcurl.dll in the 288 directory C:\WINDOWS\SYSTEM32 for Win 9x users and c:\winnt\system32 for 289 NT-family users. 290 291 2- Refer to Linker Links point 3 - Replace -lcurl with -lcurldll. 292 293 Voila you're done. 294 295 The non-SSL static Library build may not be possible to use at least as of the 296 time of this writing - v7.14. Check reference emails - Phillipe and I found it 297 impossible to fully compile as certain files were missing for linking. No big 298 loss as SSL is a major plus. 299 300 Hope this Helps 301 302 Tom 303
