# Undefined reference to \`\_imp\_\_agread' **URL:** \ **Category:** Help\ **Created:** [September 27, 2021, 8:18pm UTC](https://forum.graphviz.org/t/undefined-reference-to-imp-agread/850 "2021-09-27T20:18:42Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![student](https://avatars.discourse-cdn.com/v4/letter/s/ecc23a/32.png) [@student](https://forum.graphviz.org/u/student)\ **Post date:** [September 27, 2021, 8:18pm UTC](https://forum.graphviz.org/t/undefined-reference-to-imp-agread/850/1 "2021-09-27T20:18:42Z")
Hi there, I’m a student trying to use Graphviz as an external library in my C project, using Windows. However, when I try to compile it, I receive undefined reference errors to the functions included in “gvc.h” and “cgraph.h”. For example, agread and gvContext. Currently, I am only working on the Windows portion. Here is my Makefile: ```auto .PHONY: all clean #CFLAGS = `pkg-config --cflags glib-2.0` #LDLIBS = `pkg-config --libs glib-2.0` CFLAGS = -I"C:/Program Files/Graphviz/include/graphviz" LDIR = -L"C:/Program Files/Graphviz/lib" LIBS = -lgvc -lcgraph binaries=sqlpsql all: $(binaries) sqlpsql: SQLP.c SQLPGrammar.y SQLPScanner.l SQLPtoSQL-main.c Preprocess.c Rules.c ifeq ($(OS),Windows_NT) win_bison -v -d SQLPGrammar.y win_flex --nounput -D SQLPGrammar SQLPScanner.l gcc -Wall -o sqlpsql SQLP.c SQLPtoSQL-main.c Preprocess.c Rules.c $(CFLAGS) $(LDIR) $(LIBS) else bison -v -d SQLPGrammar.y flex --nounput -D SQLPGrammar SQLPScanner.l gcc -Wall SQLP.c SQLPtoSQL-main.c Preprocess.c Rules.c -o sqlpsql rm -f lex.yy.c SQLPGrammar.tab.c SQLPGrammar.tab.h endif clean: -rm -f *.o *.output $(binaries) ``` On my computer, the header files are in: C:/Program Files/Graphviz/include/graphviz The lib files are in: C:/Program Files/Graphviz/lib I have added both locations to the Makefile using the -I and -L tags, as above. Along with a very simple main function invoking the two functions (in another file), here is my SQLP.c file: ```auto #include #include #include #include "SQLP.h" void generate_graph(){ FILE *fp; fp = fopen("C:/Users/claud/Documents/UW/4A/Roseseed/test.dot", "w+"); fputs("digraph ERD {\n", fp); fputs("graph [rankdir = \"LR\"];\n", fp); fputs("ranksep=2;\n", fp); fputs("\"SCOTT.DEPT\" [label=\" SCOTT.DEPT|DEPTNO \\l |DNAME \\l LOC \\l \" shape = \"record\"];\n", fp); fputs("\"SCOTT.EMP\" [label=\" SCOTT.EMP|DEPTNO \\l |EMPNO \\l ENAME \\l JOB \\l MGR \\l STARTDATE \\l SAL \\l COMM \\l \" shape = \"record\"];\n", fp); fputs("\"SCOTT.DEPT\":\"PK_DEPT\"->\"SCOTT.EMP\":\"FK_DEPTNO\" [arrowhead = crow];}\n", fp); fclose(fp); export_graph(); } void export_graph(){ FILE *fp; fp = fopen("C:/Users/claud/Documents/UW/4A/Roseseed/test.dot", "r"); Agraph_t *g; g = agread(fp, 0); GVC_t *gvc; gvc = gvContext(); gvLayout(gvc, g, "dot"); gvRender(gvc, g, "png", fopen("C:/Users/claud/Documents/UW/4A/Roseseed/test.png", "w")); gvFreeLayout(gvc, g); agclose(g); } ``` All other files compile properly because they do not include these header files. And here is the full output of running make on Git Bash in the location of the Makefile: ```auto $ make win_bison -v -d SQLPGrammar.y win_flex --nounput -D SQLPGrammar SQLPScanner.l gcc -Wall -o sqlpsql SQLP.c SQLPtoSQL-main.c Preprocess.c Rules.c -I"C:/Program Files/Graphviz/include/graphviz" -L"C:/Program Files/Graphviz/lib" -lgvc -lcgraph C:\Users\claud\AppData\Local\Temp\ccEwgb5N.o:SQLP.c:(.text+0x3abe): undefined reference to `_imp__agread' C:\Users\claud\AppData\Local\Temp\ccEwgb5N.o:SQLP.c:(.text+0x3ac8): undefined reference to `_imp__gvContext' C:\Users\claud\AppData\Local\Temp\ccEwgb5N.o:SQLP.c:(.text+0x3ae7): undefined reference to `_imp__gvLayout' C:\Users\claud\AppData\Local\Temp\ccEwgb5N.o:SQLP.c:(.text+0x3b1b): undefined reference to `_imp__gvRender' C:\Users\claud\AppData\Local\Temp\ccEwgb5N.o:SQLP.c:(.text+0x3b2f): undefined reference to `_imp__gvFreeLayout' C:\Users\claud\AppData\Local\Temp\ccEwgb5N.o:SQLP.c:(.text+0x3b3c): undefined reference to `_imp__agclose' collect2.exe: error: ld returned 1 exit status make: *** [Makefile:13: sqlpsql] Error 1 ``` It seems like the header files are found, just none of the functions are defined. What can I do to fix this and compile the project? I am a beginner, any help is greatly appreciated! 🙂 ---
**Author:** ![magjac](https://sea2.discourse-cdn.com/graphviz/user_avatar/forum.graphviz.org/magjac/32/16_2.png) [@magjac](https://forum.graphviz.org/u/magjac)\ **Post date:** [September 27, 2021, 9:11pm UTC](https://forum.graphviz.org/t/undefined-reference-to-imp-agread/850/2 "2021-09-27T21:11:32Z")
The `agread` function is defined in `lib/cgraph`. Try using `LIBS = -lgvc -lcgraph`. ---
**Author:** ![student](https://avatars.discourse-cdn.com/v4/letter/s/ecc23a/32.png) [@student](https://forum.graphviz.org/u/student)\ **Post date:** [September 27, 2021, 9:19pm UTC](https://forum.graphviz.org/t/undefined-reference-to-imp-agread/850/3 "2021-09-27T21:19:29Z")
> [@magjac](#): > > `LIBS = -lgvc -lcgraph` . Thanks for your message, I tried that and I am still receiving the same error. Please let me know if there is anything else I could try! ---
**Author:** ![magjac](https://sea2.discourse-cdn.com/graphviz/user_avatar/forum.graphviz.org/magjac/32/16_2.png) [@magjac](https://forum.graphviz.org/u/magjac)\ **Post date:** [September 27, 2021, 9:32pm UTC](https://forum.graphviz.org/t/undefined-reference-to-imp-agread/850/4 "2021-09-27T21:32:26Z")
Try removing `-static` ---
**Author:** ![student](https://avatars.discourse-cdn.com/v4/letter/s/ecc23a/32.png) [@student](https://forum.graphviz.org/u/student)\ **Post date:** [September 27, 2021, 9:34pm UTC](https://forum.graphviz.org/t/undefined-reference-to-imp-agread/850/6 "2021-09-27T21:34:44Z")
Thanks! Unfortunately, not that either. That was my attempt to remove the \_ _imp_ from the error message, which was not successful… ---
**Author:** ![magjac](https://sea2.discourse-cdn.com/graphviz/user_avatar/forum.graphviz.org/magjac/32/16_2.png) [@magjac](https://forum.graphviz.org/u/magjac)\ **Post date:** [September 28, 2021, 6:07am UTC](https://forum.graphviz.org/t/undefined-reference-to-imp-agread/850/7 "2021-09-28T06:07:17Z")
Can you post your full source code and the full Makefile? Also the command you’re invoking to build and the full output you get? ---
**Author:** ![student](https://avatars.discourse-cdn.com/v4/letter/s/ecc23a/32.png) [@student](https://forum.graphviz.org/u/student)\ **Post date:** [September 28, 2021, 1:47pm UTC](https://forum.graphviz.org/t/undefined-reference-to-imp-agread/850/8 "2021-09-28T13:47:24Z")
Yes, posted! Thank you and please let me know if there is anything else I can show you that would be helpful. ---
**Author:** ![magjac](https://sea2.discourse-cdn.com/graphviz/user_avatar/forum.graphviz.org/magjac/32/16_2.png) [@magjac](https://forum.graphviz.org/u/magjac)\ **Post date:** [September 28, 2021, 4:02pm UTC](https://forum.graphviz.org/t/undefined-reference-to-imp-agread/850/9 "2021-09-28T16:02:43Z")
You write that you are on Windows. Are you using MinGW or Cygwin or something else that gives you `make` and `gcc`? ---
**Author:** ![magjac](https://sea2.discourse-cdn.com/graphviz/user_avatar/forum.graphviz.org/magjac/32/16_2.png) [@magjac](https://forum.graphviz.org/u/magjac)\ **Post date:** [September 28, 2021, 5:56pm UTC](https://forum.graphviz.org/t/undefined-reference-to-imp-agread/850/10 "2021-09-28T17:56:05Z")
There were a lot of missing files, but after working around that I managed to compile and link your project without any problems. However, if I comment out the `LIBS = -lgvc -lcgraph` line in the Makefile I get exactly the same error messages like you. This suggests to me that the libraries actually are not in the location that you’ve given or that they have an unexpected name of format. Try: ```auto ls -l "C:/Program Files/Graphviz/lib" ``` and see what you find. If you are using MinGW you should see something like `libcgraph.dll.a` and `libgvc.dll.a` at least. ---
**Author:** ![magjac](https://sea2.discourse-cdn.com/graphviz/user_avatar/forum.graphviz.org/magjac/32/16_2.png) [@magjac](https://forum.graphviz.org/u/magjac)\ **Post date:** [September 28, 2021, 6:16pm UTC](https://forum.graphviz.org/t/undefined-reference-to-imp-agread/850/11 "2021-09-28T18:16:22Z")
Now that I think of it, I think you’re more likely to see something like `cgraph.lib` and `gvc.lib` which also should work. If you are not using MinGW, but Cygwin, you might want to try to download the experimental Cygwin version from [https://gitlab.com/graphviz/graphviz/-/package\_files/17473242/download](https://gitlab.com/graphviz/graphviz/-/package_files/17473242/download), but I haven’t tried that myself. ---
**Author:** ![student](https://avatars.discourse-cdn.com/v4/letter/s/ecc23a/32.png) [@student](https://forum.graphviz.org/u/student)\ **Post date:** [September 28, 2021, 6:25pm UTC](https://forum.graphviz.org/t/undefined-reference-to-imp-agread/850/12 "2021-09-28T18:25:26Z")
This is what I see when I run that command: ```auto $ ls -l "C:/Program Files/Graphviz/lib" total 128 -rw-r--r-- 1 claud 197609 5674 Jan 18 2021 cdt.lib -rw-r--r-- 1 claud 197609 20492 Jan 18 2021 cgraph.lib -rw-r--r-- 1 claud 197609 60886 Jan 18 2021 gvc.lib -rw-r--r-- 1 claud 197609 1878 Jan 18 2021 gvplugin_core.lib -rw-r--r-- 1 claud 197609 1974 Jan 18 2021 gvplugin_dot_layout.lib -rw-r--r-- 1 claud 197609 1930 Jan 18 2021 gvplugin_gdiplus.lib -rw-r--r-- 1 claud 197609 2006 Jan 18 2021 gvplugin_neato_layout.lib -rw-r--r-- 1 claud 197609 1898 Jan 18 2021 gvplugin_pango.lib -rw-r--r-- 1 claud 197609 5602 Jan 18 2021 pathplan.lib drwxr-xr-x 1 claud 197609 0 Sep 27 15:38 pkgconfig/ -rw-r--r-- 1 claud 197609 3236 Jan 18 2021 xdot.lib ``` So, this means my files are in the right location? I’m not sure what you’re suggesting, I installed make from Chocolatey and gcc is MingGW. What should I try? ---
**Author:** ![magjac](https://sea2.discourse-cdn.com/graphviz/user_avatar/forum.graphviz.org/magjac/32/16_2.png) [@magjac](https://forum.graphviz.org/u/magjac)\ **Post date:** [September 28, 2021, 6:27pm UTC](https://forum.graphviz.org/t/undefined-reference-to-imp-agread/850/13 "2021-09-28T18:27:54Z")
If gcc is MinGW it should work. Are you using bash from MinGW as your shell? Type `env` and post the result. ---
**Author:** ![student](https://avatars.discourse-cdn.com/v4/letter/s/ecc23a/32.png) [@student](https://forum.graphviz.org/u/student)\ **Post date:** [September 28, 2021, 6:29pm UTC](https://forum.graphviz.org/t/undefined-reference-to-imp-agread/850/14 "2021-09-28T18:29:02Z")
I’m using Git Bash. When I type env it’s a really long result: ```auto $ env USERDOMAIN=DESKTOP-QM67A37 OS=Windows_NT COMMONPROGRAMFILES=C:\Program Files\Common Files PROCESSOR_LEVEL=6 PSModulePath=C:\Program Files\WindowsPowerShell\Modules;C:\WINDOWS\system32\WindowsPowerShell\v1.0\Modules CommonProgramW6432=C:\Program Files\Common Files CommonProgramFiles(x86)=C:\Program Files (x86)\Common Files platformcode=KV MSYSTEM_CARCH=x86_64 DISPLAY=needs-to-be-defined HOSTNAME=DESKTOP-QM67A37 PUBLIC=C:\Users\Public CONFIG_SITE=/mingw64/etc/config.site EXEPATH=C:\Program Files\Git OnlineServices=Online Services MSYSTEM_CHOST=x86_64-w64-mingw32 USERNAME=claud ChocolateyInstall=C:\ProgramData\chocolatey LOGONSERVER=\\DESKTOP-QM67A37 PROCESSOR_ARCHITECTURE=AMD64 LOCALAPPDATA=C:\Users\claud\AppData\Local COMPUTERNAME=DESKTOP-QM67A37 !::=::\ SYSTEMDRIVE=C: USERPROFILE=C:\Users\claud PATHEXT=.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC;.PY;.PYW SYSTEMROOT=C:\WINDOWS USERDOMAIN_ROAMINGPROFILE=DESKTOP-QM67A37 PROCESSOR_IDENTIFIER=Intel64 Family 6 Model 142 Stepping 10, GenuineIntel MINGW_PACKAGE_PREFIX=mingw-w64-x86_64 OneDriveConsumer=C:\Users\claud\OneDrive PWD=/c/Users/claud/Documents/UWaterloo/4A/Roseseed/SQLPtoSQL SSH_ASKPASS=/mingw64/libexec/git-core/git-gui--askpass HOME=/c/Users/claud TMP=/tmp LC_CTYPE=en_US.UTF-8 TERM_PROGRAM=mintty TERM_PROGRAM_VERSION=3.4.4 MSYSTEM_PREFIX=/mingw64 OneDrive=C:\Users\claud\OneDrive PROCESSOR_REVISION=8e0a TMPDIR=/tmp NUMBER_OF_PROCESSORS=8 ProgramW6432=C:\Program Files COMSPEC=C:\WINDOWS\system32\cmd.exe APPDATA=C:\Users\claud\AppData\Roaming SHELL=/usr/bin/bash TERM=xterm WINDIR=C:\WINDOWS MINGW_CHOST=x86_64-w64-mingw32 ProgramData=C:\ProgramData SHLVL=1 PLINK_PROTOCOL=ssh ACLOCAL_PATH=/mingw64/share/aclocal:/usr/share/aclocal PROGRAMFILES=C:\Program Files MANPATH=/mingw64/local/man:/mingw64/share/man:/usr/local/man:/usr/share/man:/usr/man:/share/man ORIGINAL_TEMP=/tmp ORIGINAL_TMP=/tmp ALLUSERSPROFILE=C:\ProgramData TEMP=/tmp DriverData=C:\Windows\System32\Drivers\DriverData MSYSTEM=MINGW64 MINGW_PREFIX=/mingw64 asl.log=Destination=file SESSIONNAME=Console RegionCode=NA ProgramFiles(x86)=C:\Program Files (x86) PATH=/c/Users/claud/bin:/mingw64/bin:/usr/local/bin:/usr/bin:/bin:/mingw64/bin:/usr/bin:/c/Users/claud/bin:/c/Program Files/Eclipse Foundation/jdk-11.0.12.7-hotspot/bin:/c/Python39/Scripts:/c/Python39:/c/Program Files (x86)/Intel/Intel(R) Management Engine Components/iCLS:/c/Program Files/Intel/Intel(R) Management Engine Components/iCLS:/c/windows/system32:/c/windows:/c/windows/System32/Wbem:/c/windows/System32/WindowsPowerShell/v1.0:/c/Program Files (x86)/Intel/Intel(R) Management Engine Components/DAL:/c/Program Files/Intel/Intel(R) Management Engine Components/DAL:/c/Program Files (x86)/Intel/Intel(R) Management Engine Components/IPT:/c/Program Files/Intel/Intel(R) Management Engine Components/IPT:/c/Program Files (x86)/NVIDIA Corporation/PhysX/Common:/c/WINDOWS/system32:/c/WINDOWS:/c/WINDOWS/System32/Wbem:/c/WINDOWS/System32/WindowsPowerShell/v1.0:/c/WINDOWS/System32/OpenSSH:/c/Program Files/Intel/WiFi/bin:/c/Program Files/Common Files/Intel/WirelessCommon:/c/Program Files/PuTTY:/cmd:/c/Program Files (x86)/nodejs:/c/ProgramData/chocolatey/bin:/c/Gradle/gradle-7.1.1/bin:/c/Kotlin/kotlinc/bin:/c/MinGW/bin:/c/Autoconf/autoconf/bin:/c/FlexBison:/c/Graphviz/lib:/c/Graphviz/include/graphviz:/c/ProgramData/chocolatey/lib/gsudo/bin:/c/Users/claud/AppData/Local/Microsoft/WindowsApps:/c/Users/claud/AppData/Local/Programs/MiKTeX/miktex/bin/x64:/c/Users/claud/AppData/Roaming/npm:/c/Users/claud/AppData/Local/Programs/Microsoft VS Code/bin:/c/Users/claud/AppData/Local/GitHubDesktop/bin:/c/Program Files/Graphviz/bin:/usr/bin/vendor_perl:/usr/bin/core_perl PS1=\[\033]0;$TITLEPREFIX:$PWD\007\]\n\[\033[32m\]\u@\h \[\033[35m\]$MSYSTEM \[\033[33m\]\w\[\033[36m\]`__git_ps1`\[\033[0m\]\n$ HOMEDRIVE=C: ChocolateyLastPathUpdate=132772436600413009 PKG_CONFIG_PATH=/mingw64/lib/pkgconfig:/mingw64/share/pkgconfig INFOPATH=/usr/local/info:/usr/share/info:/usr/info:/share/info HOMEPATH=\Users\claud ORIGINAL_PATH=/mingw64/bin:/usr/bin:/c/Users/claud/bin:/c/Program Files/Eclipse Foundation/jdk-11.0.12.7-hotspot/bin:/c/Python39/Scripts:/c/Python39:/c/Program Files (x86)/Intel/Intel(R) Management Engine Components/iCLS:/c/Program Files/Intel/Intel(R) Management Engine Components/iCLS:/c/windows/system32:/c/windows:/c/windows/System32/Wbem:/c/windows/System32/WindowsPowerShell/v1.0:/c/Program Files (x86)/Intel/Intel(R) Management Engine Components/DAL:/c/Program Files/Intel/Intel(R) Management Engine Components/DAL:/c/Program Files (x86)/Intel/Intel(R) Management Engine Components/IPT:/c/Program Files/Intel/Intel(R) Management Engine Components/IPT:/c/Program Files (x86)/NVIDIA Corporation/PhysX/Common:/c/WINDOWS/system32:/c/WINDOWS:/c/WINDOWS/System32/Wbem:/c/WINDOWS/System32/WindowsPowerShell/v1.0:/c/WINDOWS/System32/OpenSSH:/c/Program Files/Intel/WiFi/bin:/c/Program Files/Common Files/Intel/WirelessCommon:/c/Program Files/PuTTY:/cmd:/c/Program Files (x86)/nodejs:/c/ProgramData/chocolatey/bin:/c/Gradle/gradle-7.1.1/bin:/c/Kotlin/kotlinc/bin:/c/MinGW/bin:/c/Autoconf/autoconf/bin:/c/FlexBison:/c/Graphviz/lib:/c/Graphviz/include/graphviz:/c/ProgramData/chocolatey/lib/gsudo/bin:/c/Users/claud/AppData/Local/Microsoft/WindowsApps:/c/Users/claud/AppData/Local/Programs/MiKTeX/miktex/bin/x64:/c/Users/claud/AppData/Roaming/npm:/c/Users/claud/AppData/Local/Programs/Microsoft VS Code/bin:/c/Users/claud/AppData/Local/GitHubDesktop/bin:/c/Program Files/Graphviz/bin _=/usr/bin/env ``` ---
**Author:** ![magjac](https://sea2.discourse-cdn.com/graphviz/user_avatar/forum.graphviz.org/magjac/32/16_2.png) [@magjac](https://forum.graphviz.org/u/magjac)\ **Post date:** [September 28, 2021, 6:55pm UTC](https://forum.graphviz.org/t/undefined-reference-to-imp-agread/850/15 "2021-09-28T18:55:58Z")
I’m not using GitBash when I compile. For that I use MinGW directly. If you’ve installed MinGW (which you indicate by saying gcc is MinGW), try starting a MinGW bash, e.g. by running `mingw64.exe` or `mingw32.exe` from PowerShell and try to compile your program that way. ---
**Author:** ![student](https://avatars.discourse-cdn.com/v4/letter/s/ecc23a/32.png) [@student](https://forum.graphviz.org/u/student)\ **Post date:** [September 28, 2021, 7:11pm UTC](https://forum.graphviz.org/t/undefined-reference-to-imp-agread/850/16 "2021-09-28T19:11:37Z")
![image](https://global.discourse-cdn.com/graphviz/original/1X/8792e47d6ced55a0b4f03ee4b01629f6efe1cce5.png) Are any of these what you mean? Sorry, I’m not very familiar with MinGW. These are all in the location: C:\MinGW\bin And if one of them is, how would I then compile my code? What command do you run? And how to I get back to my Makefile? Thanks! ---
**Author:** ![magjac](https://sea2.discourse-cdn.com/graphviz/user_avatar/forum.graphviz.org/magjac/32/16_2.png) [@magjac](https://forum.graphviz.org/u/magjac)\ **Post date:** [September 28, 2021, 7:17pm UTC](https://forum.graphviz.org/t/undefined-reference-to-imp-agread/850/17 "2021-09-28T19:17:32Z")
No. Mine is in C:\tools\msys64\mingw64.exe. When run it opens a new terminal window with MinGW bash. In that window, just `cd` to your directory as usual. ---
**Author:** ![student](https://avatars.discourse-cdn.com/v4/letter/s/ecc23a/32.png) [@student](https://forum.graphviz.org/u/student)\ **Post date:** [September 28, 2021, 7:18pm UTC](https://forum.graphviz.org/t/undefined-reference-to-imp-agread/850/18 "2021-09-28T19:18:45Z")
Would you mind letting me know where you downloaded this from? Is there a link I can use? I don’t seem to have it then. Thanks! ---
**Author:** ![magjac](https://sea2.discourse-cdn.com/graphviz/user_avatar/forum.graphviz.org/magjac/32/16_2.png) [@magjac](https://forum.graphviz.org/u/magjac)\ **Post date:** [September 28, 2021, 7:20pm UTC](https://forum.graphviz.org/t/undefined-reference-to-imp-agread/850/19 "2021-09-28T19:20:41Z")
Yes, you seem to have a very old gcc as well. I used `choco install --yes --no-progress msys2` in PowerShell. ---
**Author:** ![magjac](https://sea2.discourse-cdn.com/graphviz/user_avatar/forum.graphviz.org/magjac/32/16_2.png) [@magjac](https://forum.graphviz.org/u/magjac)\ **Post date:** [September 28, 2021, 7:28pm UTC](https://forum.graphviz.org/t/undefined-reference-to-imp-agread/850/20 "2021-09-28T19:28:48Z")
Run as administrator of course. Omit `--no-progress` if you want to see what’s happening. I just copied the command from our CI where we don’t want any verbosity. ---
**Author:** ![magjac](https://sea2.discourse-cdn.com/graphviz/user_avatar/forum.graphviz.org/magjac/32/16_2.png) [@magjac](https://forum.graphviz.org/u/magjac)\ **Post date:** [September 28, 2021, 7:31pm UTC](https://forum.graphviz.org/t/undefined-reference-to-imp-agread/850/22 "2021-09-28T19:31:55Z")
> [@student](#): > > `/c/Users/claud` I know. It’s a bit confusing. Try `cd /c/Users/claud` to your normal home directory. [Next page](https://forum.graphviz.org/t/undefined-reference-to-imp-agread/850.md?page=2)