void-packages/srcpkgs/yoshimi/patches/cmake.patch

--- src/CMakeLists.txt.orig	2017-10-15 22:35:17.000000000 +0200
+++ src/CMakeLists.txt	2017-10-22 18:09:47.997475553 +0200
@@ -105,7 +105,7 @@
 
 set (BuildOptionsBasic
     "-O3 -msse -msse2 -mfpmath=sse -ffast-math -fomit-frame-pointer"
-    CACHE STRING "basic X86 complier options"
+    CACHE STRING "basic X86 compiler options"
 )
 
 set (BuildOptionsDebug
@@ -118,6 +118,34 @@
     message(FATAL_ERROR "pkg-config required but not found")
 endif (PKG_CONFIG_FOUND)
 
+include (CheckFunctionExists)
+# musl systems don’t have random_r() and also need argp-standalone
+check_function_exists(random_r randomR)
+
+if (randomR)
+    add_definitions(-DHAVE_RANDOM_R)
+endif(randomR)
+
+check_c_source_compiles (
+    "#include <argp.h>
+     int main () {
+         int argc=1;
+         char *argv[]={\"test\"};
+         argp_parse(0,argc,argv,0,0,0);
+         return 0;
+     }" LIBC_HAS_ARGP
+)
+
+if (NOT LIBC_HAS_ARGP)
+    message(STATUS "libc does not have argp")
+    find_library (ARGP_LIB argp REQUIRED)
+    if (ARGP_LIB)
+        message(STATUS "Found libargp")
+    else(ARGP_LIB)
+        message(FATAL_ERROR "libargp required but not found")
+    endif(ARGP_LIB)
+endif(NOT LIBC_HAS_ARGP)
+
 # libz
 set (CMAKE_REQUIRED_LIBRARIES z)
 check_c_source_compiles (
@@ -497,6 +525,10 @@
 
 target_link_libraries (yoshimi ${ExternLibraries})
 
+if (ARGP_LIB)
+    target_link_libraries (yoshimi ${ARGP_LIB})
+endif(ARGP_LIB)
+
 install (TARGETS yoshimi RUNTIME DESTINATION bin)
 
 install (DIRECTORY ../banks DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/yoshimi