Darling: fatal error: 'float.h' file not found

[CuriousTommy]

I have been trying to get Daring to compile on my Fedora 29 machine, but I am currently running into issue where it can't find float.h. I tried to use dnf provides "*/include/float.h", but it wasn't exactly obvious what package I was suppose to install.

Here is the entire log if you want to look at it. I also made sure to have all the dependencies installed (as stated from the wiki). Does anyone know what I need to do to fix this issue?

[bugaevc]

The file is /usr/lib64/clang/7.0.1/include/float.h, provided by the clang-libs package (which is a dependency of clang package, which is a dependency of Darling as listed on the wiki).

You're likely to have other problems building Darling on F29 however due to this. I'm using a F28 version of clang (6.0), installable on F29 with dnf downgrade clang --releasever=28.

[CuriousTommy]

The weird this is that the file does exist:

$ test -e /usr/lib64/clang/7.0.1/include/float.h && echo file exists || echo file does not exist
file exists

dnf also states that clang-libs is already installed:

$ sudo dnf install clang-libs
Last metadata expiration check: 0:00:07 ago on Tue 26 Mar 2019 07:43:55 AM PDT.
Package clang-libs-7.0.1-6.fc29.x86_64 is already installed.
Dependencies resolved.
Nothing to do.
Complete!

Yet, I still get the same error when I run make -j8. Could this be a cmake issue? Also, I noticed that the bug report said that the issue was fixed. Was it not fixed for 7.0.1?

[bugaevc]

Hmm, now I can reproduce this. /usr/lib64/clang/8.0.0/include/stdatomic.h exists, but I get

../src/external/libpthread/src/internal.h:74:10: fatal error: 'stdatomic.h' file not found
#include <stdatomic.h>
         ^~~~~~~~~~~~~

[bugaevc]

Does this workaround fix it for you?

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index a426392e..b5c32e93 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -41,7 +41,7 @@ include_directories("${CMAKE_CURRENT_SOURCE_DIR}/include")
 include(compiler_include)
 GetCompilerInclude(COMPILER_INC_PATH)
 message(STATUS "Compiler include path detected as ${COMPILER_INC_PATH}")
-include_directories(${COMPILER_INC_PATH})
+include_directories(/usr/..${COMPILER_INC_PATH})

 find_package(BISON)
 find_package(FLEX)

[CuriousTommy]

@bugaevc I can confirm that the float.h issue is fixed. With that being said, I am still not able to compile daring because of an unrelated issue (#497).

Should I close this issue?

[bugaevc]

Should I close this issue?

Not yet, I'll commit the workaround and that will close it

[andyneff]

@CuriousTommy with the combination of this fix on the new master (which includes the 497 fix), the rpms compile and work now.

[Newbytee]

@CuriousTommy with the combination of this fix on the new master (which includes the 497 fix), the rpms compile and work now.

I pardon my ignorance, but what do you mean by "new master"? Following the build instructions provided I still have this issue on Fedora 29. I've not attempted to downgrade Clang however.

[CuriousTommy]

@Newbie13XD The master branch was update to fix the javascript building issue (https://github.com/darlinghq/darling/commit/9fc61ce83101f7005e1bf29cf184a9b4f907d51f).

You will still have to apply bugaevc's patch, since he has not submitted a fix to the master branch at the time of this writing.

[bugaevc]

You will still have to apply bugaevc's patch, since he has not submitted a fix to the master branch at the time of this writing.

Sorry for that; I'm busy this month (or procrastinating when not busy) and just don't have time to commit that patch or finish some other fixes/improvements (xtrace, O2) that I have locally.

[Eragonfr]

Strangly i'have this error to. But i'm on Archlinux and the file exist in /usr/lib/clang/9.0.0/include/float.h.

[ahyattdev]

@Eragonfr the workaround @bugaevc used has been broken by recent CMake versions. 24f09b59e300183230c8c2e5356a81948ea48cae should fix this issue permanently by disabling CMake from filtering out "system" paths from our includes.

[Eragonfr]

It seems to be good.