[PATCH] configure: add a fallback check for zlib

diff --git a/18/e4b0abf00ac50ac1749e66926d7b6b7d724b9f b/18/e4b0abf00ac50ac1749e66926d7b6b7d724b9f
new file mode 100644 (file)
index 0000000..87bd056
--- /dev/null
+++ b/18/e4b0abf00ac50ac1749e66926d7b6b7d724b9f
@@ -0,0 +1,121 @@
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+From: =?UTF-8?q?X=C4=ABc=C3=B2?= <xico@atelo.org>\r
+To: notmuch@notmuchmail.org\r
+Subject: [PATCH] configure: add a fallback check for zlib\r
+Date: Sat, 10 May 2014 11:44:00 -0700\r
+Message-Id: <1399747440-5611-1-git-send-email-xico@atelo.org>\r
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+References: <m2mwepex03.fsf@guru.guru-group.fi>\r
+Cc: Tomi Ollila <tomi.ollila@iki.fi>\r
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+\r
+Since zlib is part of the base system, FreeBSD chose not to register it\r
+in pkg-config through zlib.pc. As a fallback test, configure will build\r
+and run a zlib version check and make sure the header and library\r
+versions are compatible.\r
+---\r
+ compat/have_zlib.c |  6 ++++++\r
+ configure          | 21 ++++++++++++++++-----\r
+ 2 files changed, 22 insertions(+), 5 deletions(-)\r
+ create mode 100644 compat/have_zlib.c\r
+\r
+diff --git a/compat/have_zlib.c b/compat/have_zlib.c\r
+new file mode 100644\r
+index 0000000..abaeedd\r
+--- /dev/null\r
++++ b/compat/have_zlib.c\r
+@@ -0,0 +1,6 @@\r
++#include <zlib.h>\r
++\r
++int main(void)\r
++{\r
++    return (ZLIB_VERNUM) < (MINVER) || zlibVersion()[0] != (ZLIB_VERSION)[0];\r
++}\r
+diff --git a/configure b/configure\r
+index 9bde2eb..7a11ded 100755\r
+--- a/configure\r
++++ b/configure\r
+@@ -340,16 +340,27 @@ else\r
+     errors=$((errors + 1))\r
+ fi\r
+ \r
+-printf "Checking for zlib (>= 1.2.5.2)... "\r
++zv1=1 zv2=2 zv3=5 zv4=1\r
++printf "Checking for zlib (>= $zv1.$zv2.$zv3.$zv4)... "\r
+ have_zlib=0\r
+-if pkg-config --atleast-version=1.2.5.2 zlib; then\r
++if pkg-config --atleast-version=$zv1.$zv2.$zv3.$zv4 zlib; then\r
+     printf "Yes.\n"\r
+     have_zlib=1\r
+     zlib_cflags=$(pkg-config --cflags zlib)\r
+     zlib_ldflags=$(pkg-config --libs zlib)\r
+ else\r
+-    printf "No.\n"\r
+-    errors=$((errors + 1))\r
++    # Try finding zlib directly (e.g. on FreeBSD)\r
++    zlib_cflags=\r
++    zlib_ldflags=-lz\r
++    if ${CC} ${zlib_cflags} -DMINVER=0x$zv1$zv2$zv3$zv4 -o compat/have_zlib "$srcdir"/compat/have_zlib.c ${zlib_ldflags} > /dev/null 2>&1 && ./compat/have_zlib\r
++    then\r
++        printf "Yes.\n"\r
++        have_zlib=1\r
++    else\r
++        printf "No.\n"\r
++        errors=$((errors + 1))\r
++    fi\r
++    rm -f compat/have_zlib\r
+ fi\r
+ \r
+ printf "Checking for talloc development files... "\r
+@@ -509,7 +520,7 @@ EOF\r
+       echo "  http://xapian.org/"\r
+     fi\r
+     if [ $have_zlib -eq 0 ]; then\r
+-      echo "  zlib library (>= version 1.2.5.2, including development files such as headers)"\r
++      echo "  zlib library (>= version $zv1.$zv2.$zv3.$zv4, including development files such as headers)"\r
+       echo "  http://zlib.net/"\r
+       echo\r
+     fi\r
+-- \r
+1.9.2\r
+\r