Trialing building without an R library to link against

configure

@@ -668,14 +668,14 @@ SSE2_BITSHUFFLE
 MSSE2
 SSE2
 ZSTD_LIB
-ZSTD_INCLUDE
 BUILD_ZSTD
 OBJEXT
 EXEEXT
 ac_ct_CC
 LDFLAGS
-AR
+NO_RLIB
 R_CPPFLAGS
+AR
 RANLIB
 MAKE
 CPPFLAGS
@@ -2419,8 +2419,6 @@ MAKE=`"${R_HOME}/bin/R" CMD config MAKE`
 
 RANLIB=`"${R_HOME}/bin/R" CMD config RANLIB`
 
-R_CPPFLAGS=`"${R_HOME}/bin/R" CMD config --cppflags`
-
 
 AR=`"${R_HOME}/bin/R" CMD config AR`
 if test "x$AR" = "xERROR: no information for variable 'AR'"
@@ -2473,6 +2471,18 @@ fi
 fi
 
 
+R_CPPFLAGS=`"${R_HOME}/bin/R" CMD config --cppflags`
+
+if [ -z "$R_CPPFLAGS" ]; then
+  R_CPPFLAGS=""
+  NO_RLIB="-DNO_RLIB"
+else
+  NO_RLIB=""
+fi
+
+
+
+
 ac_config_files="$ac_config_files src/Makevars"
 
 
@@ -3607,25 +3617,20 @@ if test -z "$HAVE_ZSTD"; then
 printf "%s\n" "$as_me: compiling bundled Zstd library" >&6;}
   BUILD_ZSTD=libzstd.a
 
-  ZSTD_INCLUDE="-I. -Icommon"
-
   ZSTD_LIB=compression_tools/zstd/libzstd.a
 
 else
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: Using system Zstd library" >&5
 printf "%s\n" "$as_me: Using system Zstd library" >&6;}
   BUILD_ZSTD=""
 
-  ZSTD_INCLUDE=""
-
   ZSTD_LIB=-lzstd
 
 fi
 
 
 
 
-
 ##############################
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: configuring the BLOSC filter..." >&5
@@ -4098,7 +4103,7 @@ printf "%s\n" "$as_me: Using system BLOSC library" >&6;}
 
 fi
 
-ac_config_files="$ac_config_files src/compression_tools/blosc/lib/blosc-1.20.1/Makefile src/compression_tools/blosc/Makefile"
+ac_config_files="$ac_config_files src/compression_tools/blosc/lib/blosc-1.20.1/Makefile src/compression_tools/blosc/Makefile src/compression_tools/blosc/lib/snappy-1.1.1/Makefile"
 
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
@@ -4803,6 +4808,7 @@ do
     "src/Makevars") CONFIG_FILES="$CONFIG_FILES src/Makevars" ;;
     "src/compression_tools/blosc/lib/blosc-1.20.1/Makefile") CONFIG_FILES="$CONFIG_FILES src/compression_tools/blosc/lib/blosc-1.20.1/Makefile" ;;
     "src/compression_tools/blosc/Makefile") CONFIG_FILES="$CONFIG_FILES src/compression_tools/blosc/Makefile" ;;
+    "src/compression_tools/blosc/lib/snappy-1.1.1/Makefile") CONFIG_FILES="$CONFIG_FILES src/compression_tools/blosc/lib/snappy-1.1.1/Makefile" ;;
 
   *) as_fn_error $? "invalid argument: \`$ac_config_target'" "$LINENO" 5;;
   esac

configure.ac

@@ -23,13 +23,24 @@ AC_SUBST(CXXPICFLAGS, `"${R_HOME}/bin/R" CMD config CXXPICFLAGS`)
 AC_SUBST(CPPFLAGS, `"${R_HOME}/bin/R" CMD config CPPFLAGS`)
 AC_SUBST(MAKE, `"${R_HOME}/bin/R" CMD config MAKE`)
 AC_SUBST(RANLIB, `"${R_HOME}/bin/R" CMD config RANLIB`)
-AC_SUBST(R_CPPFLAGS, `"${R_HOME}/bin/R" CMD config --cppflags`)
 
 dnl seems unreliable as to whether this information is available
 AR=`"${R_HOME}/bin/R" CMD config AR`
 AS_IF([test "x$AR" = "xERROR: no information for variable 'AR'"], [AC_PATH_PROG([AR], [ar])], [])
 AC_SUBST(AR)
 
+R_CPPFLAGS=`"${R_HOME}/bin/R" CMD config --cppflags`
+
+if [[ -z "$R_CPPFLAGS" ]]; then
+  R_CPPFLAGS=""
+  NO_RLIB="-DNO_RLIB"
+else
+  NO_RLIB=""
+fi
+
+AC_SUBST(R_CPPFLAGS)
+AC_SUBST(NO_RLIB)
+
 AC_CONFIG_FILES([src/Makevars])
 
 ##############################
@@ -67,17 +78,14 @@ fi
 if test -z "$HAVE_ZSTD"; then
   AC_MSG_NOTICE(compiling bundled Zstd library)
   AC_SUBST(BUILD_ZSTD, libzstd.a)
-  AC_SUBST(ZSTD_INCLUDE, "-I. -Icommon")
   AC_SUBST(ZSTD_LIB, compression_tools/zstd/libzstd.a)
 else
   AC_MSG_NOTICE(Using system Zstd library)
   AC_SUBST(BUILD_ZSTD, "")
-  AC_SUBST(ZSTD_INCLUDE, "")
   AC_SUBST(ZSTD_LIB, -lzstd)
 fi
 
 AC_SUBST(BUILD_ZSTD)
-AC_SUBST(ZSTD_INCLUDE)
 AC_SUBST(ZSTD_LIB)
 
 ##############################
@@ -201,5 +209,5 @@ else
   AC_SUBST(BLOSC_LIB, -lblosc)
 fi
 
-AC_CONFIG_FILES([src/compression_tools/blosc/lib/blosc-1.20.1/Makefile src/compression_tools/blosc/Makefile])
+AC_CONFIG_FILES([src/compression_tools/blosc/lib/blosc-1.20.1/Makefile src/compression_tools/blosc/Makefile src/compression_tools/blosc/lib/snappy-1.1.1/Makefile])
 AC_OUTPUT

src/compression_tools/blosc/lib/blosc-1.20.1/Makefile.in

@@ -1,4 +1,4 @@
-EXTRA_FLAGS+=-I../lz4-1.9.2 -I../snappy-1.1.1 -I../../../zstd @MSSE2@ @MAVX2@ -DUSING_R
+EXTRA_FLAGS+=-I../lz4-1.9.2 -I../snappy-1.1.1 -I../../../zstd @MSSE2@ @MAVX2@ -DUSING_R @NO_RLIB@
 FLAGS=$(PKG_CFLAGS) $(PKG_CPICFLAGS) $(PKG_CPPFLAGS) $(PKG_R_CPPFLAGS) $(EXTRA_FLAGS)
 
 BLOSC_FILES := $(sort $(wildcard *.c))

src/compression_tools/blosc/lib/snappy-1.1.1/Makefile

@@ -1,6 +1,6 @@
 #SHELL=/bin/sh
 
-FLAGS = $(PKG_CXXFLAGS) $(PKG_CXXPICFLAGS) $(PKG_CPPFLAGS) $(PKG_R_CPPFLAGS) -DUSING_R
+FLAGS = $(PKG_CXXFLAGS) $(PKG_CXXPICFLAGS) $(PKG_CPPFLAGS) $(PKG_R_CPPFLAGS) -DUSING_R 
 
 SNAPPY_OBJS=snappy.o \
 			snappy-c.o \

src/compression_tools/blosc/lib/snappy-1.1.1/Makefile.in

@@ -0,0 +1,22 @@
+#SHELL=/bin/sh
+
+FLAGS = $(PKG_CXXFLAGS) $(PKG_CXXPICFLAGS) $(PKG_CPPFLAGS) $(PKG_R_CPPFLAGS) -DUSING_R @NO_RLIB@
+
+SNAPPY_OBJS=snappy.o \
+			snappy-c.o \
+			snappy-sinksource.o \
+			snappy-stubs-internal.o
+
+all: $(SNAPPY_OBJS)
+
+snappy.o: snappy.cc
+	$(CXX) $(FLAGS) -c snappy.cc
+snappy-c.o: snappy-c.cc
+	$(CXX) $(FLAGS) -c snappy-c.cc
+snappy-sinksource.o: snappy-sinksource.cc
+	$(CXX) $(FLAGS) -c snappy-sinksource.cc
+snappy-stubs-internal.o: snappy-stubs-internal.cc
+	$(CXX) $(FLAGS) -c snappy-stubs-internal.cc
+
+clean:
+	rm -f *.o

src/compression_tools/blosc/lib/snappy-1.1.1/snappy.cc

@@ -36,8 +36,17 @@
 #include <string>
 #include <vector>
 
-#include <R_ext/Error.h>
-#include <R_ext/Print.h>
+#if !defined(NO_RLIB)
+#  include <R_ext/Error.h>
+#  include <R_ext/Print.h>
+#else
+#  ifndef Rprintf
+#    define Rprintf(x, ...) (printf(x, ...))
+#  endif
+#  ifndef error
+#    define error(x, ...) (fprintf(stderr, x, ...); abort())
+#  endif 
+#endif
 
 namespace snappy {