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Editorial Team
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Asked: 2026-06-04T18:45:53+00:00

I am trying to pull some code from another project into an NDK project,

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I am trying to pull some code from another project into an NDK project, and when I build I’m getting the following error:

error: 'modfl' was not declared in this scope

In the source file I have #import <math.h> and the call is as follows:

long double tempValLong;
double tempValDouble; // This is initialized to a decimal number
long double n = modfl(tempValDouble , &tempValLong);

Application.mk includes APP_STL := gnustl_static. Am I missing something, or does Android not include the modfl function?

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1 Answer

  1. Editorial Team

    First of all – #import is very non-standard directive in C/C++ code. You should use #include.

    As for modfl – Android NDK doesn’t have it. Most likely because of cross-platform issues. long double is not supported on ARM. You should use double instead of long double and use the modf function.

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