Try to fix build on linux/arm32 (attempt 2)

Author: AlexPeshkoff

builds/posix/make.defaults

@@ -443,3 +443,5 @@ FIREBIRD_MSG    = $(FIREBIRD)/firebird.msg
 PLATFORM_PATH	=	os/posix
 TRACE_OS_Sources	=
 
+# Atomics
+ATOMICLIB=

builds/posix/prefix.linux_arm

@@ -20,7 +20,8 @@
 
 #LD=@CXX@
 
-COMMON_FLAGS=-DLINUX -DARM -pipe -MMD -fPIC -fsigned-char -fmessage-length=0 -DFB_SEND_FLAGS=MSG_NOSIGNAL -latomic
+COMMON_FLAGS=-DLINUX -DARM -pipe -MMD -fPIC -fsigned-char -fmessage-length=0 -DFB_SEND_FLAGS=MSG_NOSIGNAL
 
 PROD_FLAGS=$(COMMON_FLAGS) -O3
 DEV_FLAGS=$(COMMON_FLAGS) -p -ggdb -Werror=delete-incomplete -Wall -Wno-non-virtual-dtor
+ATOMICLIB=atomic

configure.ac

@@ -1039,6 +1039,9 @@ dnl Check for libraries
 AC_SEARCH_LIBS(dlopen, dl)
 AC_CHECK_LIB(m, main)
 AC_SEARCH_LIBS(inet_aton, resolv)
+if test "$ATOMICLIB"; then
+	AC_CHECK_LIB($ATOMICLIB, main)
+fi
 
 dnl Check for libraries for static C++ runtime linking
 AC_CHECK_LIB(supc++, main, XE_APPEND(-lsupc++, STATIC_CXXSUPPORT_LIB))