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15 lines
689 B
Diff
15 lines
689 B
Diff
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diff --git a/CMakeLists.txt b/CMakeLists.txt
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index a871f4c..f9f6b34 100644
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--- a/CMakeLists.txt
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+++ b/CMakeLists.txt
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@@ -965,7 +965,8 @@ OPTION(ALSOFT_REQUIRE_DSOUND "Require DirectSound backend" OFF)
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OPTION(ALSOFT_REQUIRE_MMDEVAPI "Require MMDevApi backend" OFF)
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IF(HAVE_WINDOWS_H)
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# Check MMSystem backend
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- CHECK_INCLUDE_FILES("windows.h;mmsystem.h" HAVE_MMSYSTEM_H -D_WIN32_WINNT=0x0502)
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+ set(CMAKE_REQUIRED_DEFINITIONS -D_WIN32_WINNT=0x0502)
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+ CHECK_INCLUDE_FILES("windows.h;mmsystem.h" HAVE_MMSYSTEM_H)
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IF(HAVE_MMSYSTEM_H)
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CHECK_SHARED_FUNCTION_EXISTS(waveOutOpen "windows.h;mmsystem.h" winmm "" HAVE_LIBWINMM)
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IF(HAVE_LIBWINMM)
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