[libc] Add missing -latomic for rv32 (#99337)

mikhailramalho · yuxuanchen1997 · commit fa206ba8b94d · 2024-07-25T12:51:29.000-07:00
Summary: On rv32, libatomic is needed to build libc when mpfr and gmp are enabled. Test Plan: Reviewers: Subscribers: Tasks: Tags: Differential Revision: https://phabricator.intern.facebook.com/D60250843
diff --git a/libc/cmake/modules/LLVMLibCCheckMPFR.cmake b/libc/cmake/modules/LLVMLibCCheckMPFR.cmake
@@ -13,6 +13,6 @@ else()
     SOURCES
     ${LIBC_SOURCE_DIR}/utils/MPFRWrapper/check_mpfr.cpp
     LINK_LIBRARIES
-      -lmpfr -lgmp
+      -lmpfr -lgmp -latomic
   )
 endif()
diff --git a/libc/test/src/CMakeLists.txt b/libc/test/src/CMakeLists.txt
@@ -24,7 +24,7 @@ function(add_fp_unittest name)
       message(FATAL_ERROR "Hermetic math test cannot require MPFR.")
     endif()
     set(test_type UNIT_TEST_ONLY)
-    list(APPEND MATH_UNITTEST_LINK_LIBRARIES libcMPFRWrapper -lmpfr -lgmp)
+    list(APPEND MATH_UNITTEST_LINK_LIBRARIES libcMPFRWrapper -lmpfr -lgmp -latomic)
   endif()
   list(APPEND MATH_UNITTEST_LINK_LIBRARIES LibcFPTestHelpers)
 

Original file line number	Diff line number	Diff line change
`@@ -13,6 +13,6 @@ else()`
`13`	`13`	`SOURCES`
`14`	`14`	`${LIBC_SOURCE_DIR}/utils/MPFRWrapper/check_mpfr.cpp`
`15`	`15`	`LINK_LIBRARIES`
`16`		`- -lmpfr -lgmp`
	`16`	`+ -lmpfr -lgmp -latomic`
`17`	`17`	`)`
`18`	`18`	`endif()`