Respect CXX, compiler flags
Fix build with --as-needed

http://bugs.gentoo.org/show_bug.cgi?id=344119

--- config/sys/Linux-g++.gmk
+++ config/sys/Linux-g++.gmk
@@ -2,9 +2,7 @@
 # ------ GNU/LINUX ------ gcc 3.2 and higher
 #
 ifeq ($(G4SYSTEM),Linux-g++)
-  CXX       := g++
-  CXXFLAGS  := -W -Wall -ansi -pedantic -Wno-non-virtual-dtor -Wno-long-long
-  CXXFLAGS  += -Wwrite-strings -Wpointer-arith -Woverloaded-virtual -pipe
+  CXXFLAGS  += -ansi
 #
 # Uncomment the following options to activate Pentium4 chip specific
 # floating-point operations on the SSE unit. It will allow for more stable
@@ -14,27 +12,16 @@
 #       platforms. Will only run on Pentium4-based architectures !
 #
 # CXXFLAGS  += -march=pentium4 -mfpmath=sse
-  ifdef G4OPTIMISE
-    CXXFLAGS  += -O2
-    FCFLAGS   := -O2
-    CCFLAGS   := -O2
-  else
-    ifdef G4DEBUG
+  ifdef G4DEBUG
       CXXFLAGS  += -g
-      FCFLAGS   := -g
-      CCFLAGS   := -g
-    endif
+      FCFLAGS   += -g
+      CCFLAGS   += -g
   endif
   ifdef G4PROFILE
     CXXFLAGS  += -pg
     FCFLAGS   += -pg
     CCFLAGS   += -pg
   endif
-  ifdef G4OPTDEBUG
-    CXXFLAGS  += -O2 -g
-    FCFLAGS   += -O2 -g
-    CCFLAGS   += -O2 -g
-  endif
   ifdef G4LIB_BUILD_SHARED
     CXXFLAGS  += -fPIC
     FCFLAGS   += -fPIC
@@ -42,7 +29,6 @@
   endif
   G4RUNPATHOPTION := -Wl,-rpath 
   CC := gcc
-  FC := gfortran
   FCFLAGS += -fno-automatic -fno-backslash -fno-second-underscore
   FCLIBS := -lg2c -lnsl
   ECHO   := /bin/echo -e
@@ -108,7 +94,7 @@
   endif
   ifndef QTLIBPATH
     QTLIBPATH := $(QTHOME)/lib
-    QT_SEARCH_LIB := $(shell ls  $(QTLIBPATH)/qt$(QT_VERSION)/libq* 2>/dev/null | wc -l )
+    QT_SEARCH_LIB := $(shell ls  $(QTLIBPATH)/qt$(QT_VERSION)/lib[q,Q]t* 2>/dev/null | wc -l )
     ifneq ($(QT_SEARCH_LIB),0)
       QTLIBPATH := $(QTHOME)/lib/qt$(QT_VERSION)
     endif
@@ -140,13 +126,13 @@
   define build-granular-shared-lib
     @libdir=`(cd $(@D);/bin/pwd)`; \
      cd $(G4TMPDIR); \
-     $(CXX) -Wl,-soname,$(@F) -shared -o $$libdir/$(@F) $(INTYLIBS) *.o
+     $(CXX) $(LDFLAGS) -Wl,-soname,$(@F) -shared -o $$libdir/$(@F) *.o $(INTYLIBS);
   endef
   define build-global-shared-lib
     @libdir=`(cd $(@D);/bin/pwd)`; \
      cd $(G4TMP)/$(G4SYSTEM); \
-     $(CXX) -Wl,-soname,$(@F) -shared -o $$libdir/$(@F) $(INTYLIBS) \
-                    $(foreach dir,$(SUBLIBS),$(dir)/*.o);
+     $(CXX) $(LDFLAGS) -Wl,-soname,$(@F) -shared -o $$libdir/$(@F) \
+                    $(foreach dir,$(SUBLIBS),$(dir)/*.o) $(INTYLIBS);
   endef
 
 endif
--- config/sys/Linux-icc.gmk
+++ config/sys/Linux-icc.gmk
@@ -3,17 +3,11 @@
 #
 ifeq ($(G4SYSTEM),Linux-icc)
   CXX       := icc
-  CXXFLAGS  := -ansi -fp-model precise -no-gcc -w1
-  ifdef G4OPTIMISE
-    CXXFLAGS  += -O2
-    FCFLAGS   := -O2
-    CCFLAGS   := -O2
-  else
-    ifdef G4DEBUG
-      CXXFLAGS  += -g
-      FCFLAGS   := -g
-      CCFLAGS   := -g
-    endif
+  CXXFLAGS  += -ansi
+  ifdef G4DEBUG
+    CXXFLAGS  += -g
+    FCFLAGS   += -g
+    CCFLAGS   += -g
   endif
   ifdef G4PROFILE
     CXXFLAGS  += -qp
@@ -61,13 +55,13 @@
   define build-granular-shared-lib
     @libdir=`(cd $(@D);/bin/pwd)`; \
      cd $(G4TMPDIR); \
-     $(CXX) -Wl,-soname,$(@F) -shared -o $$libdir/$(@F) $(INTYLIBS) *.o
+     $(CXX) $(LDFLAGS) -Wl,-soname,$(@F) -shared -o $$libdir/$(@F) *.o $(INTYLIBS);
   endef
   define build-global-shared-lib
     @libdir=`(cd $(@D);/bin/pwd)`; \
      cd $(G4TMP)/$(G4SYSTEM); \
-     $(CXX) -Wl,-soname,$(@F) -shared -o $$libdir/$(@F) $(INTYLIBS) \
-                    $(foreach dir,$(SUBLIBS),$(dir)/*.o);
+     $(CXX) $(LDFLAGS) -Wl,-soname,$(@F) -shared -o $$libdir/$(@F) \
+                    $(foreach dir,$(SUBLIBS),$(dir)/*.o) $(INTYLIBS);
   endef
 
 endif