# Hi, Im a curious beginner, and Im struggling to compile my first program. **URL:** \ **Category:** Users\ **Created:** [October 19, 2026, 1:27pm UTC](https://chapel.discourse.group/t/hi-im-a-curious-beginner-and-im-struggling-to-compile-my-first-program/52184 "2026-10-19T13:27:33Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![ardieMejia](https://yyz2.discourse-cdn.com/free1/user_avatar/chapel.discourse.group/ardiemejia/32/862_2.png) [@ardieMejia](https://chapel.discourse.group/u/ardieMejia)\ **Post date:** [October 19, 2026, 1:27pm UTC](https://chapel.discourse.group/t/hi-im-a-curious-beginner-and-im-struggling-to-compile-my-first-program/52184/1 "2026-10-19T13:27:33Z")
As per the title, even after changing env variables CHPL\_LLVM to either system or bundled. Im still getting either the errors "/usr/bin/ld: cannot find -lstdc++: No such file or directory" OR "error: Make Binary - Linking" ---
**Author:** ![jabraham](https://yyz2.discourse-cdn.com/free1/user_avatar/chapel.discourse.group/jabraham/32/430_2.png) [@jabraham](https://chapel.discourse.group/u/jabraham)\ **Post date:** [October 19, 2026, 3:47pm UTC](https://chapel.discourse.group/t/hi-im-a-curious-beginner-and-im-struggling-to-compile-my-first-program/52184/2 "2026-10-19T15:47:05Z")
Is this an issue when trying to use an installed Chapel? Or an issue building Chapel itself. I am assuming the former. Can you send the output of `printchplenv --all` and `printchplenv --verify-verbose`, as well as `chpl examples/hello.chpl --print-commands` -Jade ---
**Author:** ![ardieMejia](https://yyz2.discourse-cdn.com/free1/user_avatar/chapel.discourse.group/ardiemejia/32/862_2.png) [@ardieMejia](https://chapel.discourse.group/u/ardieMejia)\ **Post date:** [October 20, 2026, 6:14am UTC](https://chapel.discourse.group/t/hi-im-a-curious-beginner-and-im-struggling-to-compile-my-first-program/52184/3 "2026-10-20T06:14:57Z")
Thanks for taking the time to reply: I actually installed using sudo apt install, since I was only curious, there would be no need for source build ## Output of $CHPL\_HOME/util/printchplenv --all machine info: Linux ardie-ThinkPad-T440 5.15.0-194-generic #204-Ubuntu SMP Wed Sep 2 13:09:23 UTC 2026 x86\_64 CHPL\_HOME: /usr/share/chapel/2.10 \* script location: /usr/share/chapel/2.10/util/chplenv CHPL\_HOST\_PLATFORM: linux64 + CHPL\_HOST\_COMPILER: gnu CHPL\_HOST\_CC: gcc CHPL\_HOST\_CXX: g++ CHPL\_HOST\_ARCH: x86\_64 CHPL\_TARGET\_PLATFORM: linux64 + CHPL\_TARGET\_COMPILER: llvm + CHPL\_TARGET\_CC: /usr/lib/llvm-15/bin/clang CHPL\_TARGET\_CXX: /usr/lib/llvm-15/bin/clang++ CHPL\_TARGET\_LD: /usr/lib/llvm-15/bin/clang++ CHPL\_TARGET\_ARCH: x86\_64 CHPL\_TARGET\_CPU: native + CHPL\_LOCALE\_MODEL: flat + CHPL\_COMM: none + CHPL\_TASKS: qthreads + CHPL\_LAUNCHER: none CHPL\_TIMERS: generic CHPL\_UNWIND: system + CHPL\_HOST\_MEM: jemalloc + CHPL\_HOST\_JEMALLOC: bundled CHPL\_TARGET\_MEM: jemalloc + CHPL\_TARGET\_JEMALLOC: bundled CHPL\_ATOMICS: cstdlib + CHPL\_GMP: system + CHPL\_HWLOC: system + CHPL\_RE2: bundled + CHPL\_LLVM: system + CHPL\_LLVM\_SUPPORT: system CHPL\_LLVM\_CONFIG: llvm-config-15 CHPL\_LLVM\_VERSION: 15 CHPL\_AUX\_FILESYS: none CHPL\_LIB\_PIC: none + CHPL\_SANITIZE: none + CHPL\_SANITIZE\_EXE: none + machine info: Linux ardie-ThinkPad-T440 5.15.0-194-generic #204-Ubuntu SMP Wed Sep 2 13:09:23 UTC 2026 x86\_64 CHPL\_HOME: /usr/share/chapel/2.10 \* script location: /usr/share/chapel/2.10/util/chplenv CHPL\_HOST\_PLATFORM: linux64 + CHPL\_HOST\_COMPILER: gnu CHPL\_HOST\_CC: gcc CHPL\_HOST\_CXX: g++ CHPL\_HOST\_ARCH: x86\_64 CHPL\_TARGET\_PLATFORM: linux64 + CHPL\_TARGET\_COMPILER: llvm + CHPL\_TARGET\_CC: /usr/lib/llvm-15/bin/clang CHPL\_TARGET\_CXX: /usr/lib/llvm-15/bin/clang++ CHPL\_TARGET\_LD: /usr/lib/llvm-15/bin/clang++ CHPL\_TARGET\_ARCH: x86\_64 CHPL\_TARGET\_CPU: native + CHPL\_LOCALE\_MODEL: flat + CHPL\_COMM: none + CHPL\_TASKS: qthreads + CHPL\_LAUNCHER: none CHPL\_TIMERS: generic CHPL\_UNWIND: system + CHPL\_HOST\_MEM: jemalloc + CHPL\_HOST\_JEMALLOC: bundled CHPL\_TARGET\_MEM: jemalloc + CHPL\_TARGET\_JEMALLOC: bundled CHPL\_ATOMICS: cstdlib + CHPL\_GMP: system + CHPL\_HWLOC: system + CHPL\_RE2: bundled + CHPL\_LLVM: system + CHPL\_LLVM\_SUPPORT: system CHPL\_LLVM\_CONFIG: llvm-config-15 CHPL\_LLVM\_VERSION: 15 CHPL\_AUX\_FILESYS: none CHPL\_LIB\_PIC: none + CHPL\_SANITIZE: none + ## Output of printchplenv --verify-verbose: machine info: Linux ardie-ThinkPad-T440 5.15.0-194-generic #204-Ubuntu SMP Wed Sep 2 13:09:23 UTC 2026 x86\_64 CHPL\_HOME: /usr/share/chapel/2.10 \* script location: /usr/share/chapel/2.10/util/chplenv CHPL\_TARGET\_PLATFORM: linux64 + CHPL\_TARGET\_COMPILER: llvm + CHPL\_TARGET\_ARCH: x86\_64 CHPL\_TARGET\_CPU: native + CHPL\_LOCALE\_MODEL: flat + CHPL\_COMM: none + CHPL\_TASKS: qthreads + CHPL\_LAUNCHER: none CHPL\_TIMERS: generic CHPL\_UNWIND: system + CHPL\_TARGET\_MEM: jemalloc + CHPL\_ATOMICS: cstdlib + CHPL\_GMP: system + CHPL\_HWLOC: system + CHPL\_RE2: bundled + CHPL\_LLVM: system + CHPL\_AUX\_FILESYS: none Running verification pass TestHostCompile Trying to compile with 'g++ /tmp/tmpgb8dsjvt/tmpzf13kk3b.cpp -o /tmp/tmpgb8dsjvt/a.out' Trying to run with '/tmp/tmpgb8dsjvt/a.out' Running verification pass TestTargetCompileCC Trying to compile with '/usr/lib/llvm-15/bin/clang /tmp/tmpjemk97hg/tmpg4\_yld\_s.c -o /tmp/tmpjemk97hg/a.out' Trying to run with '/tmp/tmpjemk97hg/a.out' Running verification pass TestTargetCompileCXX Trying to compile with '/usr/lib/llvm-15/bin/clang++ /tmp/tmplp2o8zu8/tmpeyrlggny.cpp -o /tmp/tmplp2o8zu8/a.out' Error: Verification failed: Failed to compile program: /tmp/tmplp2o8zu8/tmpeyrlggny.cpp:2:10: fatal error: 'iostream' file not found #include ^ ~~~~~~~~~ 1 error generated. ## Output of chpl hello-world.chpl --print-comand: invoking driver compilation phase chpl --driver-compilation-phase --driver-tmp-dir /tmp/chpl-ardie.deleteme-EsnEF6 hello-world.chpl --print-commands -I/usr/share/chapel/2.10/modules/standard -I/usr/share/chapel/2.10/modules/packages -I/usr/lib/chapel/2.10/runtime/include/localeModels/flat -I/usr/lib/chapel/2.10/runtime/include/localeModels -I/usr/lib/chapel/2.10/runtime/include/comm/none -I/usr/lib/chapel/2.10/runtime/include/comm -I/usr/lib/chapel/2.10/runtime/include/tasks/qthreads -I/usr/lib/chapel/2.10/runtime/include -I/usr/lib/chapel/2.10/runtime/include/qio -I/usr/lib/chapel/2.10/runtime/include/atomics/cstdlib -I/usr/lib/chapel/2.10/runtime/include/mem/jemalloc -I/usr/lib/chapel/2.10/third-party/utf8-decoder -DCHPL\_JEMALLOC\_PREFIX=chpl\_je\_ -I/usr/lib/chapel/2.10/third-party/qthread/install/linux64-x86\_64-none-llvm-none-flat-jemalloc-system/include -I/usr/lib/chapel/2.10/third-party/jemalloc/install/target/linux64-x86\_64-none-llvm-none/include -I/usr/lib/chapel/2.10/third-party/re2/install/linux64-x86\_64-none-llvm-none/include -iquote. -I/tmp/chpl-ardie.deleteme-EsnEF6 -Werror=pointer-arith -Werror=write-strings -Werror=missing-declarations -Werror=missing-prototypes -Werror=strict-prototypes -Werror=missing-format-attribute -Wno-unused-function -Wno-strict-aliasing -fno-math-errno -I/usr/share/chapel/2.10/modules/internal -DCHPL\_GEN\_CODE -pthread -I/usr/include/x86\_64-linux-gnu -include sys\_basic.h -include wctype.h -include ctype.h -include chpl-prginfo.h -include llvm/chapel\_libc\_wrapper.h invoking driver makeBinary phase chpl --driver-makebinary-phase --driver-tmp-dir /tmp/chpl-ardie.deleteme-EsnEF6 hello-world.chpl --print-commands -I/usr/share/chapel/2.10/modules/standard -I/usr/share/chapel/2.10/modules/packages -I/usr/lib/chapel/2.10/runtime/include/localeModels/flat -I/usr/lib/chapel/2.10/runtime/include/localeModels -I/usr/lib/chapel/2.10/runtime/include/comm/none -I/usr/lib/chapel/2.10/runtime/include/comm -I/usr/lib/chapel/2.10/runtime/include/tasks/qthreads -I/usr/lib/chapel/2.10/runtime/include -I/usr/lib/chapel/2.10/runtime/include/qio -I/usr/lib/chapel/2.10/runtime/include/atomics/cstdlib -I/usr/lib/chapel/2.10/runtime/include/mem/jemalloc -I/usr/lib/chapel/2.10/third-party/utf8-decoder -DCHPL\_JEMALLOC\_PREFIX=chpl\_je\_ -I/usr/lib/chapel/2.10/third-party/qthread/install/linux64-x86\_64-none-llvm-none-flat-jemalloc-system/include -I/usr/lib/chapel/2.10/third-party/jemalloc/install/target/linux64-x86\_64-none-llvm-none/include -I/usr/lib/chapel/2.10/third-party/re2/install/linux64-x86\_64-none-llvm-none/include -iquote. -I/tmp/chpl-ardie.deleteme-EsnEF6 -Werror=pointer-arith -Werror=write-strings -Werror=missing-declarations -Werror=missing-prototypes -Werror=strict-prototypes -Werror=missing-format-attribute -Wno-unused-function -Wno-strict-aliasing -fno-math-errno -I/usr/share/chapel/2.10/modules/internal -DCHPL\_GEN\_CODE -pthread -I/usr/include/x86\_64-linux-gnu -include sys\_basic.h -include wctype.h -include ctype.h -include chpl-prginfo.h -include llvm/chapel\_libc\_wrapper.h Make Binary - Linking /usr/lib/llvm-15/bin/clang++ /tmp/chpl-ardie.deleteme-EsnEF6/chpl\_\_module.o /usr/lib/chapel/2.10/runtime/lib/linux64/llvm/x86\_64/cpu-none/loc-flat/comm-none/tasks-qthreads/tmr-generic/unwind-system/mem-jemalloc/atomics-cstdlib/hwloc-system/re2-bundled/fs-none/lib\_pic-none/san-none/main.o -o /tmp/chpl-ardie.deleteme-EsnEF6/hello-world.tmp -L/usr/lib/chapel/2.10/runtime/lib/linux64/llvm/x86\_64/cpu-none/loc-flat/comm-none/tasks-qthreads/tmr-generic/unwind-system/mem-jemalloc/atomics-cstdlib/hwloc-system/re2-bundled/fs-none/lib\_pic-none/san-none -lchpl-static -L/usr/lib/chapel/2.10/third-party/qthread/install/linux64-x86\_64-none-llvm-none-flat-jemalloc-system/lib -Wl,-rpath,/usr/lib/chapel/2.10/third-party/qthread/install/linux64-x86\_64-none-llvm-none-flat-jemalloc-system/lib -lqthread -L/usr/lib/chapel/2.10/third-party/jemalloc/install/target/linux64-x86\_64-none-llvm-none/lib -ljemalloc -L/usr/lib/chapel/2.10/third-party/re2/install/linux64-x86\_64-none-llvm-none/lib -lre2 -Wl,-rpath,/usr/lib/chapel/2.10/third-party/re2/install/linux64-x86\_64-none-llvm-none/lib -L/usr/lib/chapel/2.10/runtime/lib/linux64/llvm/x86\_64/cpu-none/loc-flat/comm-none/tasks-qthreads/tmr-generic/unwind-system/mem-jemalloc/atomics-cstdlib/hwloc-system/re2-bundled/fs-none/lib\_pic-none/san-none -ldl -lhwloc -lunwind -lm -lpthread -lgmp /usr/bin/ld: cannot find -lstdc++: No such file or directory clang: error: linker command failed with exit code 1 (use -v to see invocation) child process exited with code 1 error: Make Binary - Linking child process exited with code 1 ========= The hello word file, is just a single writeln() ---
**Author:** ![jabraham](https://yyz2.discourse-cdn.com/free1/user_avatar/chapel.discourse.group/jabraham/32/430_2.png) [@jabraham](https://chapel.discourse.group/u/jabraham)\ **Post date:** [October 20, 2026, 3:51pm UTC](https://chapel.discourse.group/t/hi-im-a-curious-beginner-and-im-struggling-to-compile-my-first-program/52184/4 "2026-10-20T15:51:32Z")
Ah ok great. Its not related to your issue here, but CHPL\_LLVM doesn't need to be changed in a linux package install. I believe the primary problem is that `clang++` cannot properly compile C++, which means your C++ compiler is not working right and is why the Chapel install is broken. You can see that in the `printchplenv --verify-verbose` output. Try the following ```Chapel # should be /usr/lib/llvm-15/bin/clang++, just double checking which clang++ /usr/lib/llvm-15/bin/clang++ -v cat > hello.cpp << EOF #include int main() { std::cout << "Hello, World!" << std::endl; return 0; } EOF /usr/lib/llvm-15/bin/clang++ -v hello.cpp -o hello ./hello ``` Can you also share which OS and which OS package you are using? Based on that output, it looks like Ubuntu 22 and the Ubuntu 22 package? -Jade ---
**Author:** ![ardieMejia](https://yyz2.discourse-cdn.com/free1/user_avatar/chapel.discourse.group/ardiemejia/32/862_2.png) [@ardieMejia](https://chapel.discourse.group/u/ardieMejia)\ **Post date:** [October 21, 2026, 6:58am UTC](https://chapel.discourse.group/t/hi-im-a-curious-beginner-and-im-struggling-to-compile-my-first-program/52184/5 "2026-10-21T06:58:15Z")
Thanks Jade for your time and helpful messages. Turns out I just needed to: `sudo apt install g++-12` I found the Stack Overflow link [here](https://askubuntu.com/questions/1449769/clang-cannot-find-iostream) that explains it. Ubuntu 22 ships with gcc 12 which messes with clang. Im only ever familiar with gcc, not clang++ or g++ and what makes or breaks it. Thanks again. ---
**Author:** ![jabraham](https://yyz2.discourse-cdn.com/free1/user_avatar/chapel.discourse.group/jabraham/32/430_2.png) [@jabraham](https://chapel.discourse.group/u/jabraham)\ **Post date:** [October 21, 2026, 2:18pm UTC](https://chapel.discourse.group/t/hi-im-a-curious-beginner-and-im-struggling-to-compile-my-first-program/52184/6 "2026-10-21T14:18:46Z")
Awesome, glad its working now! Let us know if you need any more assistance. -Jade