no matching function for call to 'compile'

[priteshrnandgaonkar]

While trying to build a cocoapod for Fmt for Folly, I am facing the following error.

    - ERROR | [iOS] xcodebuild:  Headers/Public/Flipper-Fmt/fmt/compile.h:904:29: error: no matching function for call to 'compile'

Any idea how can I solve this ?

[vitaut]

What {fmt} version do you use and what are the exact build commands?

[priteshrnandgaonkar]

I am using the master branch of fmt. To build it I am using cocoapod's pod spec lint to verify if Flipper-Folly works with fmt. The current Folly version is quite old, I am trying to update it, and apparently folly now depends on fmt, thats why I am adding a cocoapod definition of fmt.

For context, apparently the older versions of folly is not compatible with xcode 12.5 RC and thats why we need to use the newer folly and need fmt as a cocoapod dep.

The pod definition for fmt is as follows

Pod::Spec.new do |spec|
    spec.name     = 'Flipper-Fmt'
    spec.version  = '7.1.6'
    spec.license  = { :type => 'MIT' }
    spec.homepage = 'https://github.com/fmtlib/fmt'
    spec.authors  = { 'Pritesh Nandgaonkar' => 'prit91@fb.com' }
    spec.summary  = '{fmt} is an open-source formatting library providing a fast and safe alternative to C stdio and C++ iostreams.    '

    spec.source   = { :git => "https://github.com/priteshrnandgaonkar/fmt.git",
                      :branch => "master" }
    spec.compiler_flags = '-DFMT_USE_CONSTEXPR=1 -DFMT_HEADER_ONLY=1'
    spec.source_files = "src/*.cc", "include/**/*.h",
    spec.public_header_files = "include/**/*.h"
    spec.requires_arc = true
    spec.ios.deployment_target = '10.0'
    spec.header_dir = 'fmt'
    spec.libraries = "stdc++" 
    spec.exclude_files = "src/fmt.cc", "src/fmt.cc"
    spec.pod_target_xcconfig = {  "USE_HEADERMAP" => "NO",
    "CLANG_CXX_LANGUAGE_STANDARD" => "c++17",
    "HEADER_SEARCH_PATHS" => "\"$(PODS_TARGET_SRCROOT)/include/\""
  }
end

Internally cocoapod uses Xcodebuild to build the source

[vitaut]

A couple of observations:

1. You are trying to compile fmt as both static and header only library which doesn't make sense. You should probably remove -DFMT_HEADER_ONLY=1.
2. You only need to add src/format.cc to source_files.
3. You should probably not define FMT_USE_CONSTEXPR=1 and let the library detect if constexpr is supported.

If you properly exclude src/fmt.cc from the build fmt/compile.h shouldn't even be built because it is not included anywhere.

[priteshrnandgaonkar]

I tried by removing -DFMT_HEADER_ONLY=1 as well got the same error.

I am using it with Folly. And it is being refferred in folly/portability/FmtCompile.h:19, so thats how the header is being reffered. The fmt pod in itself builds, but when I use it with folly it throws the above error.

[vitaut]

Please post the compiler invocation command and full error with context as text, not screenshot.

[priteshrnandgaonkar]

Here are the the full definition of podspec files

From the logs I am able to see the following command caused an issue. Hopefully this helps.

CompileC /Users/prit91/Library/Developer/Xcode/DerivedData/App-eypxktjqzwzjlgehsbremdyrpgpa/Build/Intermediates.noindex/Pods.build/Release-iphonesimulator/Flipper-Folly.build/Objects-normal/x86_64/Singleton.o /var/folders/c0/qw29qzkj5v39hgrxsz1bcsd5h2zh96/T/CocoaPods-Lint-20210428-44830-sye0d1-Flipper-Folly/Pods/Flipper-Folly/folly/Singleton.cpp normal x86_64 c++ com.apple.compilers.llvm.clang.1_0.compiler (in target 'Flipper-Folly' from project 'Pods')
        cd /var/folders/c0/qw29qzkj5v39hgrxsz1bcsd5h2zh96/T/CocoaPods-Lint-20210428-44830-sye0d1-Flipper-Folly/Pods
        export LANG\=en_US.US-ASCII
        /Applications/Xcode_12.0.0_fb.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -x c++ -target x86_64-apple-ios10.0-simulator -fmessage-length\=0 -fdiagnostics-show-note-include-stack -fmacro-backtrace-limit\=0 -std\=c++1z -stdlib\=libc++ -fmodules -fmodules-cache-path\=/Users/prit91/Library/Developer/Xcode/DerivedData/ModuleCache.noindex -fmodules-prune-interval\=86400 -fmodules-prune-after\=345600 -fbuild-session-file\=/Users/prit91/Library/Developer/Xcode/DerivedData/ModuleCache.noindex/Session.modulevalidation -fmodules-validate-once-per-build-session -Wnon-modular-include-in-framework-module -Werror\=non-modular-include-in-framework-module -Wno-trigraphs -fpascal-strings -Os -fno-common -Wno-missing-field-initializers -Wno-missing-prototypes -Werror\=return-type -Wdocumentation -Wunreachable-code -Werror\=deprecated-objc-isa-usage -Werror\=objc-root-class -Wno-non-virtual-dtor -Wno-overloaded-virtual -Wno-exit-time-destructors -Wno-missing-braces -Wparentheses -Wswitch -Wunused-function -Wno-unused-label -Wno-unused-parameter -Wunused-variable -Wunused-value -Wempty-body -Wuninitialized -Wconditional-uninitialized -Wno-unknown-pragmas -Wno-shadow -Wno-four-char-constants -Wno-conversion -Wconstant-conversion -Wint-conversion -Wbool-conversion -Wenum-conversion -Wno-float-conversion -Wnon-literal-null-conversion -Wobjc-literal-conversion -Wshorten-64-to-32 -Wno-newline-eof -Wno-c++11-extensions -DPOD_CONFIGURATION_RELEASE\=1 -DCOCOAPODS\=1 -isysroot /Applications/Xcode_12.0.0_fb.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator14.0.sdk -fasm-blocks -fstrict-aliasing -Wdeprecated-declarations -Winvalid-offsetof -g -Wno-sign-conversion -Winfinite-recursion -Wmove -Wcomma -Wblock-capture-autoreleasing -Wstrict-prototypes -Wrange-loop-analysis -Wno-semicolon-before-method-body -Wunguarded-availability -I/Users/prit91/Library/Developer/Xcode/DerivedData/App-eypxktjqzwzjlgehsbremdyrpgpa/Build/Products/Release-iphonesimulator/Flipper-Folly/include -I/var/folders/c0/qw29qzkj5v39hgrxsz1bcsd5h2zh96/T/CocoaPods-Lint-20210428-44830-sye0d1-Flipper-Folly/Pods/Headers/Private -I/var/folders/c0/qw29qzkj5v39hgrxsz1bcsd5h2zh96/T/CocoaPods-Lint-20210428-44830-sye0d1-Flipper-Folly/Pods/Headers/Private/Flipper-Folly -I/var/folders/c0/qw29qzkj5v39hgrxsz1bcsd5h2zh96/T/CocoaPods-Lint-20210428-44830-sye0d1-Flipper-Folly/Pods/Headers/Public -I/var/folders/c0/qw29qzkj5v39hgrxsz1bcsd5h2zh96/T/CocoaPods-Lint-20210428-44830-sye0d1-Flipper-Folly/Pods/Headers/Public/Flipper-Fmt -I/var/folders/c0/qw29qzkj5v39hgrxsz1bcsd5h2zh96/T/CocoaPods-Lint-20210428-44830-sye0d1-Flipper-Folly/Pods/Headers/Public/Flipper-Folly -I/var/folders/c0/qw29qzkj5v39hgrxsz1bcsd5h2zh96/T/CocoaPods-Lint-20210428-44830-sye0d1-Flipper-Folly/Pods/Headers/Public/libevent -I/var/folders/c0/qw29qzkj5v39hgrxsz1bcsd5h2zh96/T/CocoaPods-Lint-20210428-44830-sye0d1-Flipper-Folly/Pods/Flipper-Folly -I/var/folders/c0/qw29qzkj5v39hgrxsz1bcsd5h2zh96/T/CocoaPods-Lint-20210428-44830-sye0d1-Flipper-Folly/Pods/boost-for-react-native -I/var/folders/c0/qw29qzkj5v39hgrxsz1bcsd5h2zh96/T/CocoaPods-Lint-20210428-44830-sye0d1-Flipper-Folly/Pods/Flipper-DoubleConversion -I/var/folders/c0/qw29qzkj5v39hgrxsz1bcsd5h2zh96/T/CocoaPods-Lint-20210428-44830-sye0d1-Flipper-Folly/Pods/libevent/include -I/Users/prit91/Library/Developer/Xcode/DerivedData/App-eypxktjqzwzjlgehsbremdyrpgpa/Build/Intermediates.noindex/Pods.build/Release-iphonesimulator/Flipper-Folly.build/DerivedSources-normal/x86_64 -I/Users/prit91/Library/Developer/Xcode/DerivedData/App-eypxktjqzwzjlgehsbremdyrpgpa/Build/Intermediates.noindex/Pods.build/Release-iphonesimulator/Flipper-Folly.build/DerivedSources/x86_64 -I/Users/prit91/Library/Developer/Xcode/DerivedData/App-eypxktjqzwzjlgehsbremdyrpgpa/Build/Intermediates.noindex/Pods.build/Release-iphonesimulator/Flipper-Folly.build/DerivedSources -F/Users/prit91/Library/Developer/Xcode/DerivedData/App-eypxktjqzwzjlgehsbremdyrpgpa/Build/Products/Release-iphonesimulator/Flipper-Folly -F/var/folders/c0/qw29qzkj5v39hgrxsz1bcsd5h2zh96/T/CocoaPods-Lint-20210428-44830-sye0d1-Flipper-Folly/Pods/Flipper-DoubleConversion/Frameworks -F/var/folders/c0/qw29qzkj5v39hgrxsz1bcsd5h2zh96/T/CocoaPods-Lint-20210428-44830-sye0d1-Flipper-Folly/Pods/Flipper-Glog/Frameworks -F/var/folders/c0/qw29qzkj5v39hgrxsz1bcsd5h2zh96/T/CocoaPods-Lint-20210428-44830-sye0d1-Flipper-Folly/Pods/OpenSSL-Universal/Frameworks -F/Users/prit91/Library/Developer/Xcode/DerivedData/App-eypxktjqzwzjlgehsbremdyrpgpa/Build/Products/Release-iphonesimulator/XCFrameworkIntermediates/OpenSSL -F/Users/prit91/Library/Developer/Xcode/DerivedData/App-eypxktjqzwzjlgehsbremdyrpgpa/Build/Products/Release-iphonesimulator/XCFrameworkIntermediates/double-conversion -F/Users/prit91/Library/Developer/Xcode/DerivedData/App-eypxktjqzwzjlgehsbremdyrpgpa/Build/Products/Release-iphonesimulator/XCFrameworkIntermediates/glog -Wincomplete-umbrella -DFMT_HEADER_ONLY\=1 -DFMT_USE_CONSTEXPR\=1 -DFOLLY_HAVE_BACKTRACE\=1 -DFOLLY_HAVE_CLOCK_GETTIME\=1 -DFOLLY_HAVE_PTHREAD\=1 -DFOLLY_NO_CONFIG -DFOLLY_MOBILE\=1 -DFOLLY_USE_LIBCPP\=1 -DFOLLY_HAVE_LIBGFLAGS\=0 -DFOLLY_HAVE_LIBJEMALLOC\=0 -DFOLLY_HAVE_PREADV\=0 -DFOLLY_HAVE_PWRITEV\=0 -DFOLLY_HAVE_TFO\=0 -frtti -fexceptions -std\=c++14 -Wno-error -Wno-unused-local-typedefs -Wno-unused-variable -Wno-sign-compare -Wno-comment -Wno-return-type -Wno-global-constructors -Wno-comma -include /var/folders/c0/qw29qzkj5v39hgrxsz1bcsd5h2zh96/T/CocoaPods-Lint-20210428-44830-sye0d1-Flipper-Folly/Pods/Target\ Support\ Files/Flipper-Folly/Flipper-Folly-prefix.pch -MMD -MT dependencies -MF /Users/prit91/Library/Developer/Xcode/DerivedData/App-eypxktjqzwzjlgehsbremdyrpgpa/Build/Intermediates.noindex/Pods.build/Release-iphonesimulator/Flipper-Folly.build/Objects-normal/x86_64/Singleton.d --serialize-diagnostics /Users/prit91/Library/Developer/Xcode/DerivedData/App-eypxktjqzwzjlgehsbremdyrpgpa/Build/Intermediates.noindex/Pods.build/Release-iphonesimulator/Flipper-Folly.build/Objects-normal/x86_64/Singleton.dia -c /var/folders/c0/qw29qzkj5v39hgrxsz1bcsd5h2zh96/T/CocoaPods-Lint-20210428-44830-sye0d1-Flipper-Folly/Pods/Flipper-Folly/folly/Singleton.cpp -o /Users/prit91/Library/Developer/Xcode/DerivedData/App-eypxktjqzwzjlgehsbremdyrpgpa/Build/Intermediates.noindex/Pods.build/Release-iphonesimulator/Flipper-Folly.build/Objects-normal/x86_64/Singleton.o

[vitaut]

Could you post the complete build log?

[priteshrnandgaonkar]

Here is the entire log

[vitaut]

Thanks for providing the build log. The problem is that FMT_COMPILE requires if constexpr which your compiler doesn't support. I've implemented a workaround in 355be4b.

[priteshrnandgaonkar]

Awesome! Let me try with this changes. Fingers crossed.

[priteshrnandgaonkar]

This problem was solved. Thanks a lot for a quick fix. :)