Improve bzip2 build system
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This patch makes a number of improvements to the bzip2 build system:
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* Remove the BIGFILE variable that was used to force largefile
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support. Now, the user of the Makefile is supposed to pass
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-D_FILE_OFFSET_BITS=64 when largefile support is desired.
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* Use override CFLAGS += so that additional CFLAGS can be passed on
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the command line.
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* Removed "forced" CFLAGS -O2, -g and -Winline. We don't want them by
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default, and want the build system to use its own ones.
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* When creating the symbolic links bzegrep, bzfgrep, bzless and
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bzcmp, don't link them to an absolute path, or they'll point to
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some path on the build machine.
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* Provide an install target for the shared library, which creates the
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appropriate symbolic links.
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Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
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Index: b/Makefile
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===================================================================
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--- a/Makefile
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+++ b/Makefile
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@@ -20,8 +20,7 @@
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RANLIB=ranlib
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LDFLAGS=
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-BIGFILES=-D_FILE_OFFSET_BITS=64
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-CFLAGS=-Wall -Winline -O2 -g $(BIGFILES)
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+override CFLAGS += -Wall
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# Where you want it installed when you do 'make install'
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PREFIX=/usr/local
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@@ -90,14 +89,14 @@
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cp -f libbz2.a $(PREFIX)/lib
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chmod a+r $(PREFIX)/lib/libbz2.a
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cp -f bzgrep $(PREFIX)/bin/bzgrep
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- ln -s -f $(PREFIX)/bin/bzgrep $(PREFIX)/bin/bzegrep
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- ln -s -f $(PREFIX)/bin/bzgrep $(PREFIX)/bin/bzfgrep
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+ ln -s -f bzgrep $(PREFIX)/bin/bzegrep
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+ ln -s -f bzgrep $(PREFIX)/bin/bzfgrep
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chmod a+x $(PREFIX)/bin/bzgrep
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cp -f bzmore $(PREFIX)/bin/bzmore
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- ln -s -f $(PREFIX)/bin/bzmore $(PREFIX)/bin/bzless
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+ ln -s -f bzmore $(PREFIX)/bin/bzless
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chmod a+x $(PREFIX)/bin/bzmore
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cp -f bzdiff $(PREFIX)/bin/bzdiff
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- ln -s -f $(PREFIX)/bin/bzdiff $(PREFIX)/bin/bzcmp
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+ ln -s -f bzdiff $(PREFIX)/bin/bzcmp
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chmod a+x $(PREFIX)/bin/bzdiff
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cp -f bzgrep.1 bzmore.1 bzdiff.1 $(PREFIX)/man/man1
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chmod a+r $(PREFIX)/man/man1/bzgrep.1
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Index: b/Makefile-libbz2_so
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===================================================================
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--- a/Makefile-libbz2_so
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+++ b/Makefile-libbz2_so
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@@ -23,8 +23,7 @@
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SHELL=/bin/sh
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CC=gcc
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-BIGFILES=-D_FILE_OFFSET_BITS=64
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-CFLAGS=-fpic -fPIC -Wall -Winline -O2 -g $(BIGFILES)
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+override CFLAGS += -fpic -fPIC -Wall
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OBJS= blocksort.o \
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huffman.o \
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@@ -37,8 +36,11 @@
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all: $(OBJS)
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$(CC) -shared -Wl,-soname -Wl,libbz2.so.1.0 -o libbz2.so.1.0.6 $(OBJS)
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$(CC) $(CFLAGS) -o bzip2-shared bzip2.c libbz2.so.1.0.6
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- rm -f libbz2.so.1.0
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- ln -s libbz2.so.1.0.6 libbz2.so.1.0
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+
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+install:
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+ install -m 0755 -D libbz2.so.1.0.6 $(PREFIX)/lib/libbz2.so.1.0.6
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+ ln -sf libbz2.so.1.0.6 $(PREFIX)/lib/libbz2.so
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+ ln -sf libbz2.so.1.0.6 $(PREFIX)/lib/libbz2.so.1.0
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clean:
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rm -f $(OBJS) bzip2.o libbz2.so.1.0.6 libbz2.so.1.0 bzip2-shared
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