From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: "Jan Alexander Steffens (heftig)" <heftig@archlinux.org>
Date: Fri, 1 Apr 2022 19:55:54 +0000
Subject: [PATCH] Make libstemmer a shared library

---
 GNUmakefile           | 15 +++++++--------
 libstemmer/symbol.map |  6 ++++++
 2 files changed, 13 insertions(+), 8 deletions(-)
 create mode 100644 libstemmer/symbol.map

diff --git a/GNUmakefile b/GNUmakefile
index 830a831ca615..a29886a16168 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -294,12 +294,11 @@ C_OTHER_OBJECTS = $(C_OTHER_SOURCES:.c=.o)
 JAVA_CLASSES = $(JAVA_SOURCES:.java=.class)
 JAVA_RUNTIME_CLASSES=$(JAVA_RUNTIME_SOURCES:.java=.class)
 
-CFLAGS=-g -O2 -W -Wall -Wcast-qual -Wmissing-prototypes -Wmissing-declarations -Wshadow $(WERROR)
-CPPFLAGS=
+CFLAGS+=-fPIC -W -Wall -Wcast-qual -Wmissing-prototypes -Wmissing-declarations -Wshadow $(WERROR)
 
 INCLUDES=-Iinclude
 
-all: snowball$(EXEEXT) libstemmer.a stemwords$(EXEEXT) $(C_OTHER_SOURCES) $(C_OTHER_HEADERS) $(C_OTHER_OBJECTS)
+all: snowball$(EXEEXT) libstemmer.so.0 stemwords$(EXEEXT) $(C_OTHER_SOURCES) $(C_OTHER_HEADERS) $(C_OTHER_OBJECTS)
 
 algorithms.mk: GNUmakefile libstemmer/mkalgorithms.pl $(MODULES)
 	libstemmer/mkalgorithms.pl algorithms.mk $(MODULES)
@@ -358,7 +357,7 @@ $(COMPILER_OBJECTS): $(COMPILER_HEADERS)
 # each target language section.
 CLEANFILES := $(COMPILER_OBJECTS) $(RUNTIME_OBJECTS) \
 	      $(LIBSTEMMER_OBJECTS) $(LIBSTEMMER_UTF8_OBJECTS) $(STEMWORDS_OBJECTS) snowball$(EXEEXT) \
-	      libstemmer.a stemwords$(EXEEXT) \
+	      libstemmer.so.0 stemwords$(EXEEXT) \
               libstemmer/modules.h \
               libstemmer/modules_utf8.h \
 	      stemtest$(EXEEXT) $(STEMTEST_OBJECTS) \
@@ -404,19 +403,19 @@ libstemmer/modules_utf8.h libstemmer/mkinc_utf8.mak: libstemmer/mkmodules.pl $(M
 
 libstemmer/libstemmer.o: libstemmer/modules.h $(C_LIB_HEADERS)
 
-libstemmer.a: libstemmer/libstemmer.o $(RUNTIME_OBJECTS) $(C_LIB_OBJECTS)
-	$(AR) $(ARFLAGS) $@ $^
+libstemmer.so.0: libstemmer/libstemmer.o $(RUNTIME_OBJECTS) $(C_LIB_OBJECTS)
+	$(CC) $(CFLAGS) -shared $(LDFLAGS) -Wl,-soname,$@,-version-script,libstemmer/symbol.map -o $@ $^
 
 examples/%.o: examples/%.c
 	$(CC) $(CFLAGS) $(INCLUDES) $(CPPFLAGS) -c -o $@ $<
 
-stemwords$(EXEEXT): $(STEMWORDS_OBJECTS) libstemmer.a
+stemwords$(EXEEXT): $(STEMWORDS_OBJECTS) libstemmer.so.0
 	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $^
 
 tests/%.o: tests/%.c
 	$(CC) $(CFLAGS) $(INCLUDES) $(CPPFLAGS) -c -o $@ $<
 
-stemtest$(EXEEXT): $(STEMTEST_OBJECTS) libstemmer.a
+stemtest$(EXEEXT): $(STEMTEST_OBJECTS) libstemmer.so.0
 	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $^
 
 $(c_src_dir)/stem_UTF_8_%.c $(c_src_dir)/stem_UTF_8_%.h: $(ALGORITHMS)/%.sbl snowball$(EXEEXT)
diff --git a/libstemmer/symbol.map b/libstemmer/symbol.map
new file mode 100644
index 000000000000..7a3d42356362
--- /dev/null
+++ b/libstemmer/symbol.map
@@ -0,0 +1,6 @@
+SB_STEMMER_0 {
+    global:
+        sb_stemmer_*;
+    local:
+        *;
+};