diff --git a/package/z3/Config.in b/package/z3/Config.in
index 55b0e8bb3b..8cd3128687 100644
--- a/package/z3/Config.in
+++ b/package/z3/Config.in
@@ -1,11 +1,33 @@
+# z3 supports arch for which libc fenv.h provides all four macros:
+# FE_DOWNWARD, FE_TONEAREST, FE_TOWARDZERO, FE_UPWARD
+# See for example in glibc https://sourceware.org/git/glibc.git
+# git grep -E '^[[:space:]]*#[[:space:]]*define[[:space:]]+FE_(TONEAREST|UPWARD|DOWNWARD|TOWARDZERO)' sysdeps/
+config BR2_PACKAGE_Z3_ARCH_SUPPORTS
+	bool
+	default y if BR2_aarch64 || BR2_aarch64_be
+	default y if BR2_arceb || BR2_arcle
+	default y if BR2_arm || BR2_armeb
+	default y if BR2_i386
+	default y if BR2_m68k
+	# BR2_microblaze has only FE_TONEAREST
+	default y if BR2_mips || BR2_mipsel || BR2_mips64 || BR2_mips64el
+	# BR2_nios2 has only FE_TONEAREST
+	default y if BR2_or1k
+	default y if BR2_powerpc || BR2_powerpc64 || BR2_powerpc64le
+	default y if BR2_riscv
+	default y if BR2_s390x
+	# BR2_sh has only FE_{TONEAREST,TOWARDZERO}
+	default y if BR2_sparc || BR2_sparc64
+	default y if BR2_x86_64
+	# BR2_xtensa supports only uclibc which does not have fenv.h
+
 config BR2_PACKAGE_Z3
 	bool "z3"
 	depends on BR2_INSTALL_LIBSTDCPP
 	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_7 # c++17
 	# z3 needs fenv.h which is not provided by uclibc
 	depends on !BR2_TOOLCHAIN_USES_UCLIBC
-	# fenv.h lacks FE_INVALID, FE_OVERFLOW & FE_UNDERFLOW on nios2
-	depends on !BR2_nios2
+	depends on BR2_PACKAGE_Z3_ARCH_SUPPORTS
 	help
 	  Z3, also known as the Z3 Theorem Prover, is a cross-platform
 	  satisfiability modulo theories (SMT) solver.