MantisBT - CMake
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IDProjectCategoryView StatusDate SubmittedLast Update
0015780CMakeCMakepublic2015-10-10 14:122016-06-10 14:31
ReporterKjell Irgens 
Assigned ToKitware Robot 
PrioritynormalSeverityminorReproducibilityalways
StatusclosedResolutionmoved 
PlatformLinuxOSFedoraOS Version22
Product VersionCMake 3.3.2 
Target VersionFixed in Version 
Summary0015780: Dependencies relative to /usr/include are ignored
DescriptionInclude files which are included relative to /usr/include (or /usr/local/include) do not end up in depend.make. I do not know if this is some kind of optimization to speed up dependency checking, but there should at least be some way to ensure that a specific subdirectory of /usr/include (like /usr/include/curl in the example below) is included.

The way it works on unix-like systems now, some external projects (like gtk) have include dependencies checked while others (like curl) do not. This is not very consistent.

This may of course be a Fedora-specific problem, I have not checked that.
Steps To ReproduceCMakeLists.txt:

cmake_minimum_required (VERSION 3.2)
project(mytest VERSION 1.0)
set(PROJECT_RELEASE rc2)
include_regular_expression("^.*$" "^.*$")
find_package (CURL REQUIRED)
add_executable (a.out main.cpp)

main.cpp:

#include <curl/curl.h>
int main() {return 0;}


Then run:
cmake .
make

Output of make:
CMake Error: Cannot find file "curl/curl.h".
[ 50%] Building CXX object CMakeFiles/a.out.dir/main.cpp.o
[100%] Linking CXX executable a.out

ls -l /usr/include/curl/curl.h
-rw-r--r--. 1 root root 89014 Dec 28 2014 /usr/include/curl/curl.h

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Issue History
Date ModifiedUsernameFieldChange
2015-10-10 14:12Kjell IrgensNew Issue
2015-10-10 14:57Greg JungNote Added: 0039563
2015-10-10 16:23Kjell IrgensNote Added: 0039564
2016-06-10 14:29Kitware RobotNote Added: 0042852
2016-06-10 14:29Kitware RobotStatusnew => resolved
2016-06-10 14:29Kitware RobotResolutionopen => moved
2016-06-10 14:29Kitware RobotAssigned To => Kitware Robot
2016-06-10 14:31Kitware RobotStatusresolved => closed

Notes
(0039563)
Greg Jung   
2015-10-10 14:57   
Use "curl/curl.h" and it works ok. Brackets imply looking in the
system include directories attached to the compiler.
(0039564)
Kjell Irgens   
2015-10-10 16:23   
It did now work any better for "curl/curl.h" here. Dependencies are added for other include files in brackets, as long as they are relative to a different directory like/usr/include/gtk-2.0. I really don't see the logic here.

Even if this is how it works, it is unfortunate that CMake has a different idea of where to look for include files than the compier does. I have never seen a C/C++ compiler on any UNIX-like platform that has not found include files relative to /usr/include.
(0042852)
Kitware Robot   
2016-06-10 14:29   
Resolving issue as `moved`.

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