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From 644c3380f75b20a11755e7052aa632887f3eee2b Mon Sep 17 00:00:00 2001
From: Khem Raj <raj.khem@gmail.com>
Date: Thu, 7 Jul 2022 12:32:47 -0700
Subject: [PATCH] cmake: Use alternate way to detect libm
The standard package provided with MathLib cmake module does not work
when libm is folded into libc starting glibc 2.35+
Upstream-Status: Pending
Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
CMakeLists.txt | 7 ++++++-
contrib/fonttools/CMakeLists.txt | 2 +-
fontforge/CMakeLists.txt | 2 +-
fontforgeexe/CMakeLists.txt | 2 +-
4 files changed, 9 insertions(+), 4 deletions(-)
diff --git a/CMakeLists.txt b/CMakeLists.txt
index e234cb6e9..284ba2d20 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -115,9 +115,14 @@ else()
endif()
find_package(Iconv REQUIRED)
find_package(LibXml2 REQUIRED)
-find_package(MathLib REQUIRED)
find_package(ZLIB REQUIRED)
+include(CheckLibraryExists)
+CHECK_LIBRARY_EXISTS(m pow "" HAVE_LIB_M)
+if (HAVE_LIB_M)
+ set(EXTRA_LIBS ${EXTRA_LIBS} m)
+endif (HAVE_LIB_M)
+
check_include_file(pthread.h HAVE_PTHREAD_H)
if(HAVE_PTHREAD_H)
find_package(Threads)
diff --git a/contrib/fonttools/CMakeLists.txt b/contrib/fonttools/CMakeLists.txt
index d6c698877..1608af152 100644
--- a/contrib/fonttools/CMakeLists.txt
+++ b/contrib/fonttools/CMakeLists.txt
@@ -15,7 +15,7 @@ add_executable(woff woff.c)
target_link_libraries(acorn2sfd PRIVATE fontforge)
target_link_libraries(dewoff PRIVATE ZLIB::ZLIB)
-target_link_libraries(pcl2ttf PRIVATE MathLib::MathLib)
+target_link_libraries(pcl2ttf PRIVATE ${EXTRA_LIBS})
target_link_libraries(ttf2eps PRIVATE fontforge)
target_link_libraries(woff PRIVATE ZLIB::ZLIB)
diff --git a/fontforge/CMakeLists.txt b/fontforge/CMakeLists.txt
index 9a052f360..067ef40df 100644
--- a/fontforge/CMakeLists.txt
+++ b/fontforge/CMakeLists.txt
@@ -237,7 +237,7 @@ target_link_libraries(fontforge
GLIB::GLIB
Intl::Intl
PRIVATE
- MathLib::MathLib
+ ${EXTRA_LIBS}
Iconv::Iconv
ZLIB::ZLIB
)
diff --git a/fontforgeexe/CMakeLists.txt b/fontforgeexe/CMakeLists.txt
index e2982c39d..8829993ea 100644
--- a/fontforgeexe/CMakeLists.txt
+++ b/fontforgeexe/CMakeLists.txt
@@ -121,7 +121,7 @@ if(ENABLE_PYTHON_SCRIPTING_RESULT)
target_link_libraries(fontforgeexe PRIVATE Python3::Python)
endif()
-target_link_libraries(fontforgeexe PRIVATE fontforge Iconv::Iconv MathLib::MathLib)
+target_link_libraries(fontforgeexe PRIVATE fontforge Iconv::Iconv ${EXTRA_LIBS})
install(TARGETS fontforgeexe RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
if(UNIX)
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